Appalling service from RCS card

Message received 12 Oct 20 " Your Makro has returned into collections. Process an urgent payment of R1818 to be removed from collections & reinstate your credit. Tel: ***. " I am actually appalled by the utter disregard for procedure and regulation in the way RCS card deals with clients. I have raised my concern last week when i received a message to say payment for September is due by 10 Oct 20. This payment was made 09 September 20 already and they are seeing this as an extra payment for the previous month. How do you thieve a client by accepting their money, acknowledging it and then saying that they now still outstanding for the same month in question. Since when does an account get handed over to collections after not actually defaulting or even only one payment of concern. Why is the system being used so faulted and full of holes that the consultants respond to you that that is just how it is and nothing can be done about it.