It might be worth compiling a list of visa direct debit cards or credit card that work with circle.

I tried ANZ platinum credit visa and it was a no go. I plan to get a ANZ debit visa and try that next.
Someone posted St George Debit visa is a goer.

If people that are using circle successfully in Aussie could post their type of card it would be great.

Response from Circle

We are working hard to incorporate international partnerships that will allow customer worldwide to deposit and withdraw Bitcoin to a fiat account. While some of our non-US customers have had success linking their credit/debit cards to Circle, however, not all are supported.

At this time, we are currently optimizing our non-US support and thus don't have a fix at this time. We will provide additional information soon.

Eriks, Team Circle