Absolute lack of service from FNB

The service at FNB is absolutely revolting. My account was not only hacked and cleaned out but they managed to take out more money than what was available and I am now negative R3000. When I went into the bank to reactivate my account, I asked if my account and money would be secure after changing all of my information and was told that they cannot guarantee that it will be secure. They were extremely unhelpful and couldn't answer any of my questions. All they were able to tell me was that I may not get my money back, I just have to wait to hear from the ***** department.