Personally, I'd approach your employer one last time, and go in armed with a bit of info so that you can say something along the lines of "I'm here to discuss my pay. You might remember I spoke to you about this on (insert date) and you advised me at the time that I would be paid on (insert date.)
So far I have not received any money into my account and I will be taking this matter to Fair Work Australia if it is not rectified immediately. I will also not be working any further shifts until such time that my pay is processed and received.
I apologise that it has come to this but I am a good employee and I know my rights. I would respectfully suggest that you attend to this immediately as if I have not been paid by (date) I will be taking the matter further."
Fight fire with fire, I say! You've done the work and you deserve to be paid for it. Not only that, I am pretty sure that the law will back you on that.