I booked xxx-DOH-HKT round trip in 'R' back in February. I flew the outbound yesterday. While boarding in xxx, I got an EF alert that DOH-HKT had changed from Qsuite to non, and the email offering a free flight change came around then. What I'd really like to change is the return, which I booked as HKT-BKK-DOH-xxx, with HKT-BKK as a QR codeshare operated by Bangkok Air (because all options with HKT-DOH on a nonstop were way more money). I tried during the very long layover in DOH, but no one would touch it because DOH-HKT was checked in but not yet flown. Tried today, call center staff tell me they can't do it because (a) HKT-BKK is a codeshare; (b) if the outbound had a change they can't use that to change the inbound; (c) they can only change to a flight with Qsuite. I've seen reports pf people successfully using a change from Qsuite to non to change unrelated parts of the trip. Have QR tightened this policy, or is it a matter of calling again and again?