Hahahaha. Yeah what a bitch. When me and my mate were planning to see them in Japan we sent her an email and she pretty said "drop us a line in Japan, we'll get you backstage/meet the guys etc". We were super pumped and we kept in touch...after the gig in nagoya we were waiting outside with a bunch of local metalheads and talking to the roadies and mentioned "maria" they pretty much just laughed and said she was a bitch and dont trust anything she says....when they came out she pretty much acted like she didnt know us/snubbed us...whats more she was a massive fatty. I wouldnt trust her as far as I could throw her. (not far).
You could try hammer the promotor but id say if its already cancelled there fuck all chance of it being put back on, looking at that schedule it was always going to be a maybe at best. I wonder if they tried the same thing in adelaide. WHat you might be better off doing is linking the promotor to this thread. (delete my post first haha)