Account Hacked

This morning the 11th August @9 in the morning I received a message R700 out of my account, when I try to login to my app it's said " Force closure restart app" so I phoned the bank and they cannot help me. This is one useless bank and I'm taking this matter further to the ombudsman of bankers. I told the lady my account has been hacked and all she can say I'm really sorry mam. I'm accepting my provident money to come in at end August what guarantee do I have that my money will be safe at this bank.