Hi everyone,
First time I will be flying on QR and looking to buy tickets but need some advice please

The trip will be
ATH-DOH-MEL-DOH-ATH
Leaving 15 Jul @ 7:15pm, landing 9:25pm
Returning 19 Jul @ 10:55pm, landing 12pm (these are the short stopovers)
Now ITA Matrix shows me the fare below for 1411 EUR per person in economy.
But I can't seem to find any website or a couple agents who can book it.
"Fare for 2 adults
Fare 1: Carrier QR SLEE6MGR ATH to MEL (rules)
Passenger type ADT, round trip fare, booking code S
Covers ATH-DOH (Economy), DOH-MEL (Economy)
€520.50
Fare 2: Carrier QR NLEE6MGR MEL to ATH (rules)
Passenger type ADT, round trip fare, booking code N
Covers MEL-DOH (Economy), DOH-ATH (Economy)
€479.00
Australian Int'l Passenger Service Charge (WY)
€12.15
Greek Airport Development Charge (GR)
€22.00
Greek Passenger Terminal Facilities Charge (WP)
€15.15
Greek Security Charge (WQ)
€5.00
Qatar Passenger Service Charge (PZ)
€0.88
QR YQ surcharge (YQ)
€304.00
Australian Passenger Movement Charge (AU)
€37.21
Australian Safety & Security Surcharge (WG)
€2.70
Australian Int'l Passenger Service Charge (WY)
€12.15
Subtotal per passenger
€1,411.24
Number of passengers
x2
Subtotal For 2 adults
€2,822.48
Changes to this ticket will incur a penalty fee.
Fare Construction (can be useful to travel agents)
ATH QR X/DOH QR MEL 642.08SLEE6MGR QR X/DOH QR ATH 590.89NLEE6MGR NUC 1232.97 END ROE 0.810635 XT 22.00GR 15.15WP 5.00WQ 0.88PZ 37.21AU 2.70WG 24.30WY 304.00YQ"
Not sure if this has something to do with it?
"Category 15: Sales restrictions
TICKETS MUST BE ISSUED ON QR OR HR AND MAY ONLY BE SOLD IN
ANTIGUA/BARBUDA/ARUBA/NETHERLANDS ANTILLES/BARBADOS/
BELIZE/BERMUDA/DOMINICA/BAHAMAS/MICRONESIA/CAROLINE
ISLANDS/BELIZE/COLOMBIA/COSTA RICA/DOMINICAN REPUBLIC/
ECUADOR/GRENADA/GUATEMALA/GUAM/GUYANA/HONDURAS/HAITI/
ICELAND/JAMAICA/KYRGYZSTAN/SAINT KITTS AND NEVIS/
KAZAKHSTAN/SAINT LUCIA/MONTSERRAT/NEW CALEDONIA/NICARAGUA/
PANAMA
TICKETS MUST BE ISSUED BY ELECTRONIC TICKETING.
NOTE -
ABOVE SALES RESTRICTION IS APPLICABLE ONLY WHEN
CXR HR IS ISSUING TICKETS ON BEHALF OF CXR QR.
OR - TICKETS MUST BE ISSUED ON QR OR HR AND MAY ONLY BE
SOLD IN PERU/FRENCH POLYNESIA/EL SALVADOR/TRINIDAD/
TOBAGO/URUGUAY/SAINT VINCENT/GRENADINES/SAMOA
TICKETS MUST BE ISSUED BY ELECTRONIC TICKETING.
NOTE -
ABOVE SALES RESTRICTION IS APPLICABLE ONLY WHEN
CXR HR IS ISSUING TICKETS ON BEHALF OF CXR QR.
OR - TICKETS MUST BE ISSUED ON QR.
TICKETS MUST BE ISSUED BY ELECTRONIC TICKETING.
NOTE -
ALL BOOKINGS MUST ADHERE FULLY TO QR BOOKING
POLICY AND BOOKING MUST ALWAYS BE DONE AS PER
FULL ORIGIN AND DESTINATION AVAILABILITY.
ANY VIOLATION WILL BE SUBJECT TO ADM AND ACCESS
TO QR INVENTORY WILL BE CLOSED IN CASE OF
PERSISTENT VIOLATIONS.
-----
PLEASE REFER TO GGAIRQRBTP
FOR FURTHER DETAILS OF QR PROHIBITED BOOKING
PRACTICES FOR AMADEUS USERS
-----
DRS.SABRE.COM FOR SABRE USERS
-----
G/AIR/QR0/P4 FOR WORLDSPAN USERS
-----
GCDISPLAYQR FOR GALILEO USERS
-----
FOR FURTHER INFORMATION PLEASE CONTACT LOCAL QR
OFFICES OR LOCAL GDS HELPDESK "
Can anyone advice on this?
Also, is it possible to travel in economy on the ATH legs and the legs between DOH and MEL in business?
Do QR have any package holidays which makes business class tickets cheaper like sometimes with BA?
Thanks all