I tried to replicate the OP's difficulties and was able to, sort of. The first image is from the flight selections page (same flight and date). Cancellations and changes are (seem to be) free of charge. The second page is from the Fare Rules. It turns out that this is summary, not the actual rules. Changes are technically not permitted, but the ticket can be reissued at a charge of between USD $0 and USD $75. Well, OK, technically correct, perhaps, but far from clear and maybe even a bit misleading. Note that due to the way that the software works, the screenshots are at the bottom of the post.)
Then I went to the actual fare rules, which I reproduce below.
1 - PSGR P1 ADT RULES DISPLAY
FARE COMPONENT 1 ADT MIADOH QR HKR5R1FO PU 1 N
FCL: HKR5R1FO TRF: 1 RULE: RY06 BK: H
PTC: ADT-ADULT FTC: EU -ECONOMY UNRESTRICTED
PE.PENALTIES
FROM/TO MIDDLE EAST FOR HKR5R1FO TYPE FARES
CANCELLATIONS
ANY TIME
CANCELLATIONS PERMITTED.
CHARGE USD 145.00 FOR NO-SHOW.
CHANGES
ANY TIME
CHANGES PERMITTED.
CHARGE USD 75.00 FOR NO-SHOW.
*** GENERAL RULE FOLLOWS ***
NOTE -
NO-SHOW
A PASSENGER FAILS TO CHANGE/CANCEL HIS/HER
RESERVATION 3 HOURS PRIOR TO DEPARTURE ANY RE-
BOOKING MADE WITHIN 3 HOURS PRIOR TO
DEPARTURE OR AFTER DEPARTURE OF FLIGHT AS SHOWN
IN THE E-TICKET WILL BE CONSIDERED AS A NO-SHOW.
--------------------------------------------------
FOR A SCENARIO WHERE IN THE ORIGINAL RESERVATION
IS CANCELLED PRIOR TO NO-SHOW CONDITION BUT THE
NEW RESERVATION ARE MADE AFTER DEPARTURE OF THE
FLIGHT AS MENTIONED IN E- TICKET COUPON
RESERVATION AND TICKETING STAFF MAY PERFORM A
MANUAL TRANSACTION WITHOUT ATC ENTRIES TO AVOID
THE COLLECTION OF NO-SHOW FEE
-------------------------------------------------
CHANGES AGAINST NO SHOW
- IN CASE OF NO-SHOW ONLY ONE FEE IS TO BE CHARGED
I.E. EITHER THE NO-SHOW FEE OR THE
REISSUE/REVALIDATION FEE WHICHEVER IS HIGHER AND
NOT BOTH.
--------------------------------------------------
CANCELLATION / REFUNDS AGAINST NO SHOW
- IN CASE OF NO-SHOW ONLY ONE FEE IS TO BE CHARGED
I.E. EITHER THE NO-SHOW FEE OR THE
CANCELLATION/REFUND FEE WHICHEVER IS HIGHER AND
NOT BOTH.
-------------------------------------------------
CHANGES -
FEES APPLICATION -
THE CHANGE FEE APPLIES PER TRANSACTION
THE CHANGE FEE APPLIES PER FARE COMPONENT.
WHEN MORE THAN ONE FARE COMPONENT IS CHANGED
THE HIGHEST PENALTY OF ANY OF THE CHANGED FARE
COMPONENTS WILL APPLY.
-------------------------------------------------
REPRICING SCENARIO-
1.BEFORE DEPARTURE
BEFORE UTILIZATION OF THE FIRST COUPON OF THE TKT
WHEN VOLUNTARY CHANGE OCCURS IRRESPECTIVE OF THE
OUTBOUND OR INBOUND FLIGHT OF THE JOURNEY THE
FARE WILL BE RECALCULATED APPLY NEW FARE/RULES
ADHERING TO THE AP CONDITION IN EFFECT ON THE
DATE OF THE RE-ISSUE.
2.AFTER DEPARTURE
AFTER UTILIZATION OF THE FIRST COUPON OF THE TKT
NEW FARE WILL BE RECALCULATED USING FARES IN
EFFECT ON THE DATE HISTORICAL FARES WHEN THE
ORIGINAL TICKET WAS ISSUED.
3.THE TICKET NEEDS TO BE REISSUED WITH APPLICABLE
FARE DIFFERENCE IF ANY.
4.IN CASE OF REISSUED CHANGE/NO-SHOW FEES MUST
COMPLY WITH ALL PROVISIONS OF THE ORIGINALLY
TICKET FARE.
NOTE-
CHANGE/NO-SHOW FEES MUST BE CODED AS XP IN THE
TAX FIELD
-------------------------------------------------
1FOC CHANGE PERMITTED TO INBOUND ONLY FOR
BOOKINGS MADE WITH TRAVEL BEYOND SYSTEM
RANGE
--------------------------------------------------
NAME CHANGE NOT PERMITTED.
--------------------------------------------------
CHARGE APPLIES FOR ADULT CHILD AND INFANT
OCCUPYING A SEAT. CHARGE INCLUDING NO-SHOW CHARGE
WILL NOT APPLY FOR INFANT NOT OCCUPYING A SEAT.
--------------------------------------------------
UPGRADE -
ANY TIME WITHIN THE TICKET VALIDITY FARES CAN BE
UPGRADED TO ANY FARE IN A HIGHER CABIN AND THEN
THE FARE WILL BE RECALCULATED FROM THE POINT OF
ORIGIN PROVIDED THE CONDITIONS OF THE HIGHER
CABIN HAVE BEEN MET. RE-ISSUE AND CHANGE FEE WILL
NOT BE APPLICABLE HOWEVER ADDITIONAL TAX-IF ANY
HAVE TO BE COLLECTED. IF THE RE-ISSUED TICKET IS
SUBSEQUENTLY CANCELLED THE ORIGINAL OR PENALTY OF
THE MOST RESTRICTED FARE WILL APPLY.
--------------------------------------------------
RE-ROUTING -
WHEN A VOLUNTARY CHANGE IS REQUESTED BY THE
PASSENGER CHANGES ARE PERMITTED ON THE SAME OR
HIGHER BOOKING CLASS ONLY. IN CASE THERE IS A
CHANGE OF FARE BREAK POINT AND THE NEW FARE
RESULTS IN A LOWER FARE / TAX THE RESIDUAL VALUE
AFTER DEDUCTION OF PENALTIES AS APPLICABLE WILL
BE RETURNED TO THE PASSENGER IN THE FORM OF AN
EMD FOR FURTHER TRANSPORTATION AND OR REFUND TO
THE ORIGINAL FORM OF PAYMENT.
--------------------------------------------------
WAIVERS -
WAIVED FOR DEATH OF PASSENGER OR FAMILY MEMBER.
ALL WAIVERS HAS TO BE PROCESSED THROUGH QR
OFFICES ONLY AND SUPPORTING DOCUMENT HAS TO BE
PRESENTED.
FULL REFUND PERMITTED BEFORE DEPARTURE IN CASE OF
REJECTION OF VISA. WAIVERS HAS TO BE PROCESSED
THROUGH QR OFFICES ONLY AND EMBASSY STATEMENT HAS
TO BE PRESENTED AS SUPPORTING DOCUMENT
--------------------------------------------------
CANCELLATION -
REFUND ON PARTIALLY USED TICKET -
APPLICABLE PENALTIES PLUS APPLICABLE OW FARE IN
SAME RBD. IF ONE WAY FARE IS NOT AVAILABLE OR
PUBLISHED ON THE INVENTORY MENTIONED ON THE
TICKET THEN DEDUCT NEXT AVAILABLE OW IN HIGHER
RBD FOR WHICH THE JOURNEY HAS BEEN PERFORMED
1.ANY NON-REFUNDABLE AMOUNT FROM A PREVIOUS
TICKET REMAINS NON-REFUNDABLE FOLLOWING A
CHANGE.
2.WHEN FARE COMBINED WITH A NON-REFUNDABLE FARE
THE CANCELLATION FEE WILL APPLY FROM THE AMOUNT
OF THE NON-REFUNDABLE FARE WITHOUT DEDUCT
ADDITIONAL CANCELLATION FEE.
-------------------------------------------------
REFUNDABLE PERIOD FOR REFUNDABLE FARES
ORIGINAL E-TICKET
-----------
BEFORE COMMENCEMENT OF TRAVEL
ONE YEAR FROM DATE OF ISSUE FOR TOTALLY
UNUTILIZED E-TICKET OR IN ACCORDANCE OF LOCAL
GOVERNMENT REGULATIONS
-----------
AFTER COMMENCEMENT OF TRAVEL
ONE YEAR FROM DATE OF UPLIFT /USE/ OF 1ST
COUPON OR IN ACCORDANCE OF LOCAL GOVERNMENT
REGULATIONS
------------------------------------------------
REFUNDABLE PERIOD FOR REFUNDABLE FARES FOR
EXCHANGED OR REISSUED E-TICKET /LAST E-TICKET TO
BE CONSIDERED/
-------------
BEFORE COMMENCEMENT OF TRAVEL
ONE YEAR FROM DATE OF EXCHANGE FOR TOTALLY
UNUTILIZED E-TICKET OR IN ACCORDANCE OF LOCAL
GOVERNMENT REGULATIONS
NOTE - REFUND VALIDITY IS COMPLETELY CARRIED
FORWARD TO NEW E-TICKET
-----------------------------------------------
AFTER COMMENCEMENT OF TRAVEL
ONE YEAR FROM DATE OF REISSUE FOR TOTALLY
UNUTILIZED REISSUED E-TICKET OR IN ACCORDANCE OF
LOCAL GOVERNMENT REGULATIONS
NOTE- REFUND VALIDITY IS COMPLETELY CARRIED
FORWARD TO NEW E-TICKET
OR-
ONE YEAR FROM DATE OF UPLIFT /USE/ OF 1ST COUPON
ON REISSUED E-TICKET OR IN ACCORDANCE OF LOCAL
GOVERMRNT REGULATION
NOTE- REFUND VALIDITY IS COMPLETELY CARRIED
FORWARD TO NEW E-TICKET
--------------------------------------------------
FOR NON-REFUNDABLE FARES YQ/YR AND SURCHARGES ARE
NON-REFUNDABLE
--------------------------------------------------
NON REFUNDABLE FARES YQ/YR PORTION ON REISSUED
TICKETS -
IF NON-REFUNDABLE FARE IS RE-ISSUED TO A
REFUNDABLE FARE YQ / YR WILL BE PROCESSED AS PER
THE NEW FARE CONDITION AND ONLY THE BASE FARE OF
THE ORIGINAL NON-REFUNDABLE TICKET REMAINS AS NON-
REFUNDABLE.
------------------------------------------------
PARTIAL REFUND CALCULATION YQ/YR FOR REFUNDABLE
FARE WITH FEE -
IF APPLICABLE OW FARE PLUS CANCELLATION FEES
EXCEED THE ACTUAL COLLECTED BASE FARE FOR THE
JOURNEY THE BASE FARE PAID REMAINS NON-
REFUNDABLE. ALL UNUTILIZED COUPONS FLOWN BASED
TAXES INCLUDING YQ/YR WILL BE REFUNDABLE FOR
SUCH SCENARIOS.
TICKETS WHICH ARE USED BEYOND POINT OF TURNAROUND-
NO REFUND PERMITTED
OUT OF SEQUENCE NO REFUND PERMITTED
--------------------------------------------------
WHEN A TICKET IS ISSUED WITH COMBINATION OF FARES
WITH DIFFERENT PENALTY RULES THE MOST RESTRICTIVE
CANCELLATION RULES WILL APPLY FOR THE ENTIRE
TICKET.IF A TICKET HAS BEEN RE-ISSUED MULTIPLE
TIMES AND FINALLY SUBMITTED FOR CANCELLATION/
REFUND THE HIGHEST CANCELLATION FEE/NON-REFUNDABLE
AMOUNT AMONG ALL THE REISSUED FARE WILL APPLY.
--------------------------------------------------
If you read it carefully, it does say that cancellations are permitted, and there's no mention of a charge in the event of cancellation, so one could conclude that cancellations are permitted at no charge. Changes also have no charge mentioned, other than that changes may result in a fare recalculation to current at the time of the change.
So it looks to me as if there is no fee for cancellations and changes; but it's far from clear and understandable. It feels as if it takes a lawyer to understand the fare rules. Wait a minute, -- I am one!!