Super interesting, possibly it's a website glitch, however, it's not in favor of the customer.

The only advice that I could give to you would be that you could simply fill out a feedback form, but be prepared to fill out multiple feedback forms as probably the answer for the first few of them would be: "Contact your travel agent as you booked with them" or "The ticket is non-changeable so we are unable to touch it.", etc... so don't give up and continue arguing that you were misinformed by them.

For others who wonder, the rules for JFLYBX is belowCANCELLATIONS
ANY TIME
TICKET IS NON-REFUNDABLE IN CASE OF CANCEL/NO-SHOW/
REFUND.
NOTE -
NOT PERMITTED EVEN FOR MEDICAL REASON
--
FOR NON REFUNDABLE TICKETS THE -YR- SURCHARGE
WILL NOT BE REFUNDED.
--
-
WHEN FARES ARE COMBINED THE MOST RESTRICTIVE
CONDITIONS APPLY
-
-
THE ORIGINAL NON-REFUNDABLE AMOUNT REMAINS
NON-REFUNDABLE.
--
NOTE-
SEQUENTIAL USE OF FLIGHT COUPONS - THIS FARE IS
ONLY VALID IF THE FLIGHTS ARE TAKEN IN THE BOOKED
SEQUENCE. OTHERWISE THE FARE WILL BE RECALCULATED
BASED ON THE ACTUAL FLIGHT ROUTING.
--
--
REISSUE/REBOOKING-
--
RESERVATION NEEDS TO CANCELLED AND TICKET NEEDS
TO REISSUED BEFORE THE ORIGINAL FLIGHT OTHERWISE
IS ACCEPTED AS NO SHOW
--
--
REFUND-
--
FOR ANY REFUND REQUESTS AFTER SCHEDULED FLIGHT
DEPARTURE TIME RESERVATION HISTORY SHOULD BE
CHECKED. IF FLIGHT RESERVATION HAS NOT BEEN
CANCELLED BEFORE SCHEDULED FLIGHT DEPARTURE TIME
FARE RULES APPY AND AUTOMATED REFUND CAN BE USED.
HOWEVER IF FLIGHT RESERVATION HAS BEEN CANCELLED
BEFORE SCHEDULED FLIGHT DEPARTURE TIME THEN NO
SHOW PENALTY SHOULD NOT BE CHARGED AND THUS THE
TICKET SHOULD BE REFUNDED MANUALLY.
--
CHANGES
ANY TIME
CHANGES NOT PERMITTED IN CASE OF NO-SHOW/REISSUE/
REVALIDATION.
NOTE -
------
NOT PERMITTED EVEN FOR MEDICAL REASONS
----
-
WHERE THIS FARE IS COMBINED WITH ANOTHER FARE AND
ONLY ONE FARE COMPONENT IS CHANGED THE PENALTY
CONDITIONS OF THE CHANGED FARE COMPONENT WILL
APPLY
WHEN MORE THAN ONE FARE COMPONENT IS BEING
CHANGED THE HIGHEST PENALTY OF ALL CHANGED FARE
COMPONENTS WILL APPLY
-
-