So, this has actually happened to a friend of mine, thankfully not myself but he messes around with crypto currencies, someone tried to buy some from him with a hacked NAB bank account, he is also with NAB, they suspect that he did it himself and put a freeze on his account pending an investigation which they said would be 4 weeks (4 weeks ago) and today they have said it will be another 4 weeks.
Any suggestions on how he can get this sped up?
EDIT* Extra info in relation to Frugal Rocks comment.
I believe it was about $500, essentially someone hacked "josephs" account and attempted to buy bitcoin from my friend. NAB stopped the transaction immediately, it never made it to his account but they've put a freeze on it because it might have been my friend doing it. So my friend didn't lose his bitcoin and neither NAB or "Joseph" lost any $$$.
The frustrating thing for my friend is that in the past month, he's received no updates or anything, and whenever he contacts them they just say, "yeah, we need more time for our investigation".
Sounds fishy