It is very difficult to trace the company you are referring to, which was operating in 2011, considering that in Australia there are, more and less 11 companies running
Bitcoin/crypto exchange business.
But I've read one case, almost the same as the OP's case, take a look below.
Topic: CryptoXchange: Crooks!Whats the average wait time for withdrawal of funds to an Australian bank account from CryptoXChange?
Their helpdesk said it could take upto 10 business days.
I booked a withdrawal order on 6 nov, and still no funds. I have to wait till the 22nd November by my calculations.
I'm not sure if the CryptoXChange company, also did the same to the OP, for clarity try contacting: @
augustocroppo, and ask him for help, who knows he can help your case.