9 weeks for a REFUND, their internet booking stuff up!

I tried booking flights with Jetstar over the internet, at the last stage it stated that the transaction was cancelled and I needed to start again, I did this 3 times before I gave up and booked with another airline carrier – Virgin Australia. Not once did it state that the booking was confirmed. I then received an email for a flight intinerary and checked that the credit card was charged from JetStar.
This took my credit card overdrawn, so I got charged for this. 2 lots of $650!!!
I called JetStar straight away and they agreed that there was a problem and that a refund would be given. I have called them twice a week for the last 6 weeks to find out where the refund is and everytime there is another reason, like yes we did get your fax, next time, no we didnt get your fax, bla bla bla. I had promises that someone would call me, NO ONE EVER did. I now, after 6 weeks, have been told to submit a compassionate request, which will still take 15 working days, that will be 45 working days. RIDICULOUS, especially when its their FAULT.. so so so annoyed, I dont have a spare $650 to waste..