Paid account, but still being billed

On the 07/02/2015 I paid off my truworths account with MBD. I received a paid up letter from MBD. On the very same day after paying off my account with MBD at Standard bank I went to truworths store at Balfour Park Johannesburg, to check if my account has been closed. The consultant adviced that my account is still in arrears with R137. I paid the R137 at the store, and he assured me that the account would be closed . On the 29/04/2015, I went to the Balfour Park branch again, I was told that my account is in arrears with R132. I dont understant what that R132 is for. I called truworths branch to find out what its for. They could not give me a straight answer and referred me to MBD. I called MBD and they said my account is paid up. I called the head office again and they said there is nothing they can do about it. I need someone to take reaponsibility for this and I need my credit status cleared. If MBD, says that I paid off my account and truworths says I have not. Then I expect truworths to give me an explanation for the charges.