Wont reverse my debit order

I had a business loan for a building. This loan was paid in full. On the 8/10/215 I sent the Tzaneen branch proof of final paymentment and notified the Bank that this loan had been settled and that they should forward me the Title Deed. This month my debit order for R15 000.00 went through and I contacted Elize Jordaan and told her to please reverse the amount deducted as the loan had been fully paid. She said that she would not as I had not notified the Bank. I sent proof that I did. The Bank is quick to jump on you when you owe yet you have to tell them when you finish paying. She still will not reverse the transaction and the charges. She also said the bank will continue charging me.