RCS Makro de*****ing their customers

I have an account with Makro financed by RCS for a few years. I recently wanted to close my account. I have been sending emails to RCS settlement and customer care with no response or feedback for a settlement amount. I then decided to go to Makro Store to see if I can be helped. The consultant at the RCS accounts desk phoned RCS Headoffice to get the settlement amount to close the account. I immediately went and pay the account. After 5 days I got a sms stating that there is still an amount outstanding. I phoned an emailed Head Office to ask what is going on. I did indicate that I want to settle the account an close it. Their response was that they did not provide the whole amount because there was a debit order in place to deduct the remainder amount. To which my response/email was that since 2020 I did not activate a debit order for RCS and I paid the account in Store every month. And also I believe that they have a computerized system to show the age analysis of the account. They then again send me an email stating that if I don't pay the account they are going to put interest on it. An account that was paid in advance and was supposed to be closed. Makro is cheating their customers big time. 1. there need to be an investigation into the accounts of the customers financed by RCS/Makro. 2. a proper check on the billing of interest and repayment of customers credit accounts at RCS/Makro.