Sorry to hear about this situation. Just wanted to let you know I had a good outcome last year by lodging an NCAT complaint against QF. My issue was a little different - I had a J award ticket SFO-SYD, and they cancelled the SFO flight and put me on LAX-SYD but wouldn't put me on a flight to get to LAX.
Once I submitted the NCAT complaint, it was resolved within 2 weeks by an ACTUAL human being who had the authority to pay me all my expenses. They were very reasonable about it once I was able to connected with the QF person with authority.
It's a pain to have to do, but someone has to hold them to account!
Good luck with it.
