I would have gone down to the bank in person with the receipt and spoken to the manager as soon as I realized what had happened. If you originally intended to deposit $4,000 into account A that you use all the time, did you ever transfer that money back into account A from when they wrongly deposited into account B? Did they correct that and transfer it back? Bank defensively -- assume they are idiots and never take their word for 'the money is there'. Go online and check your balance yourself. If I were you I'd get all the paperwork together, including the original receipt of deposit, and go down to the bank and talk to a manager. Be nice (even if you don't want to be). If you go in all pissed off they'll be less likely to help you. If you go in all pissed off saying 'fuck you' . . . well, you'll be the loser for sure. If you go down there and they told you to 'fuck off', what would your reaction be? Well, that's exactly how they'll react if you say it to them. If it gets straightened out - or not - you can close your account and write some letters to the higher ups about the situation and how poorly it was handled.