I currently hold DOH-YUL J, called to add BKK-DOH Y or F (J unavailable), to make my reservation BKK-DOH-YUL (no stopover, mixed cabins), but the rep said that he doesn't see BKK-YUL availability. I told him that YUL-DOH is currently unavailable, so that's why he needed to search award space BKK-DOH. .He insisted that I need to cancel and rebook. I didn't want to do that, because once my seat DOH-YUL gets cancelled, who knows if I could grab it again. He also said Avios will be returned to my account 7-14 days of I cancel, which I think is BS, I think I've seen DP on on other threads Avios redeposits are instant.

I tried to HUCA, but both my first and second call back, I got disconnected 30 secs into the hold, so I've given up for the night.

So adding (or possibly removing, too) flight(s) to redemption tickets aren't allowed with QR?