I once got involved in something simlar that happened in the UK a year or two back, but I'm not keen to get too deeply involved in something like this again, however I think you Aussies need to get tough with this company.
The quickest way to shoot this company down for breaking its published commitments is to retrieve your card payments. That way they'll get their merchant trader facility pulled by their bank and they'll virtually be left driving a truck with no wheels.
There is a procedure and, if I recall correctly, an amount restriction meaning it must be over a certain figure to make a claim. In simple terms, you evidence that you have given the company every chance to meet their contractual commitment and that they have ignored you and failed to comply. The card company then take the money back off the trader.
In my case, once the bank saw the tidal wave approaching, they shut the operation down in the blink of an eye. Even if the company went into liquidation, if you paid by credit card you'd still be able to get your money back from your card company, which is why banks react quickly in this situation.
If necessary I'll provide facts and steps to take, but it''s quite straightforward and highly effective. Once you start pulling your money back, they might even start answering their phone.
