Disgusting behavior from a bank

This is utter nonsense I haven't used my card or account for a month and now I have more then R2000 over drawn from my account every month it's the same story with this stupid bank I go into the bank brunch and still nothing is done about this I'm now going to take legal action against this bank as it is not fair that I wanted to close the account down due to money community of my account without my permission and now that I want to do that even more money comes out of my account