Unable to close account

I have been trying to close my bank account for several months now. I initially went into a branch and settled and closed my accounts, except for my current account which I was told had to be closed by my banker. My banker forgot to close the account and then I had to pay in additional funds to settle it so that she could close it. She then again forgot to settle the account and I now have to go into a branch for the second time to try and closed the account. I have spent hundreds of rands settling the account every month just because ABSA has refused to close it. This is completely unacceptable! I have gone through the right channels (branch & banker), why hasn't the account been closed yet?