For the suggestions.

At the moment, the problem is in the hands opf the manager of the GF office in Damascus ... I am to call him in 48 hours. He was keen to point out that it wasn't really a GF problem beacuse GF and QF have ended their codeshare agreement and its a QF number (might have something to do with the fact that they have cancelled the codeshare services!); and he noted that GF don't get much of the revenue from this ticket (true enough). BUT, he said he would find a solution - en sha allah. I am less that 100% confident.

If its thumbs down, then I'll investigate the RJ option or the grace miles option.

Actually Chrisstep, my routing wasn't exaclty correct. Its actually:
DRW-SYD-LAX-JFK-halifax-JFK-LHR-ALP-DAM-BAH-SIN-DRW ... so miles are very tight.

If I have to make major changes, and move up to 29000, who do I need to see QF GSA or BA?