Standard bank refusal to close my account

So a few years ago about two and a half I think two people showed up at my door and asked me to open a standard bank account. Because my employer is with standard bank in decided to take a chance and open an account with them. So forward six months down the line everyone I go to sgandard bank the waiting period to be helped is more than an hour and n somehow my app and my card was locked. That brings us to attempt number one to close my account. I get to standard bank now Tha first establishment is about 4 kilometers away from my house so I walked al the way there and asked them to close my account which guess what they refuse because the balance is R15.00 after explaining my situation and asking them just to pay out the R15.00 or just keep it bur to please just close the account they still refuse. Needles to say I left very upset about the situations. So forward another few months down the line and they open another standard bank 2 kilometers away from my house which is a plus because now I do jot have to walk that far. I go to them in an attempt to close that account and again they refuse to do because of a negative balance this time of R50. 00. I left again very upset now they sent me a statement this month of a rediculous outstanding negative balance of almost R300 on an account that was suppose to be closed almost 2 years ago. Is this how they make money of people I tried to close that account multiple times I haven't used it for almost two years.