ABSA will not close my cheque account with them?!

At the beginning of last month (March) I closed my account with ABSA in Sandton (their Sales Manager, helped me) he said to wait 7 days for the people that I have swiped my card with to deduct money then it will be done. After more than 2 weeks I called and I was told that yes the account has been closed. Now last week I received a statement from ABSA stating an amount of \charges"I owe the bank. When I went to the branch again the Teller told me she will get the Branch Manager to call me back which never happened. I called the branch again on Thursday (22.04.2014) to speak to the Branch Manager who transferred the query back to the guy who failed to help me the first time. He took my details and said he will call me back. I had to call him back again because he never called me"