How do you plan to handle explaining to the magistrate (if you progress to a full hearing) on what exactly "ticketing" means for changed award flights, and why this caused you to lose your seat? (Assuming that's the facts of your case.) See my previous comments which no one replied to - I'm concerned that NCAT would likely believe Qantas as the more knowledgeable party about ticketing systems. Qantas is likely to just say something like, "sorry it couldn't be helped it's the partner airline's fault" when in fact we know that Qantas could have re-ticketed the changed flight. I feel you might need some kind of expert witness report to make your testimony credible.
See the PDF linked at the bottom here:
Evidence and witnesses . But I don't know who would be an appropriate expert - perhaps a registered travel agent, but you'd have to find one who knows about reward tickets.