Useless "bank"

My bank account is overdrawn by more than R100 for the first time I have this account. There is an unauthorized card payment that keeps debiting my card and this stupid bank tells me everything I already could see on my statement, they can't tell me what the payment was for exactly and refuse to sort out my bank account for overdrawn charge. I requested to speak to management on my last call and I was hold for more than 5mins and that's a long time. When I asked to close my bank account I was told to go into a branch. So I will definitely be closing my account and if these charges don't get removed then I'll close it without paying a cent and you guys can send the sheriff for it. I'm sure standard bank can do a better job and the only I had this account was for convenience sake.