Hi @Zoomster! It’s not possible at the moment. Fiat-ADA pairs are only available in Korea (Upbit-Coinnest)
An alternative might be Coinspot (AUD), but a bit more expensive in fees as it is with credit card.
You might want to consider buying ADA with ETH on Bittrex or Binance (see my post comparing the two here), it’s cheaper and faster. I would avoid Bitcoin at the moment if I were you (too slow with high transaction fees)