Poor customer care and incompetence

I paid off my credit account on the 17th of feb asked for it to be closed couple of days later I was informed that it was closed, end of Feb it was debited by Absa. I called three following days trying h to get the money reversed I was not assists on the 5,if not march I made I reversal myself at my bank. Today (7th April 2018)I get a statement saying I owe the 508. I called their call center I was assisted by Linda for 40min Insisting that they paid me on the 6th of march and it is not reflecting on my statement. After going back and forth he quoted the account number deposited into and it does.not match my account number and he does not want to say they paid into the wrong account. I am told that they will confirm with their credit dept and call me.back. I find it *********** o their part and they are denting my credit record. I no longer want to.do.business with Absa... I want this sorted and my credit score updated and nothing to so with Absa... I am so furious to say the least.