Standard bank bad service

I have paid off and closed my Revolving credit plan loan twice, the second time I went into Castle walk branch to hear if the account was closed, it still was not clossed 11th of Mei, and I had to pay R 242.17 because they did not close it before. Now I have recieved another statement, with a amount off R115 that need to be paid because the again did not close it. I phoned Standard bank to ask what is going on, they put me through 3 times and 12 min later they still did not help me. I need I account to be clossed