I understand the situation is difficult if you're living in Australia.
It's actually really frustrating tbh. I had to literally close down all my .au domains. And, the one I kept live, redirected that to a .nz. It's GEO IP blocking Australia.
But it gets even worse, while I'm unable to use a .au, or for that matter any TLD to promote off shores casinos etc to Aussies, there are Trademark holders still using their .au domains to promote casinos to Aussies. The IGA was a joke in 2001 - it's still one now!