Absa is the worst

I have an Absa Credit Card which has been paid up in March of 2020. In matter of fact I paid R400 to much which put this credit card in the Debit. I have not used my credit card in more than a year and had it only for emergencies. So with this card paid in full I did no worry about statements until an debt collecting agency called me about the outstanding arears on my ABSA Credit card. Absa did not contact me at all only the Anthony and associates to inform me about a R735 outstanding. While my card was paid in full and not used Absa used the extra R400 I paid into this card as well as accumulated another R735 onto my card expecting me to pay these money for what. I have phone time and time again getting no help from anybody and being transferred from one to the other person and still this problem is not resolved. I will now go public and contact Carte Blanche due to the fact that Absa is creating cost onto already paid cards to enrich themselves. *****ing from the customers they have. I will also be closing all business with ABSA and take all the documents to my lawyer to pursuit a Harassments case and take this matter up with the consumer board.