RCS BUILDERS STORE CARD

I am a customer with this company for the past 2 years with a Builders store card. I noticed an irregular entry on my statement wherein their billing department has debited my account for an amount of R2 165.50. Numerous telephone calls and emails were done requesting an explanation and a reversal of this transaction. Each time I have spoken to different personnel at RCS who promised to attend to this but have failed hopelessly. It is clear that one department has no idea of what the other departments client interactions are. Their customer care department was also copied on all emails sent but was returned as their mailbox was full. This is a clear evidence that many customers have concerns or issues that they are not happy with. The staff have no commitment to customer care & satisfaction and some of them seem unfami**** with their own business processes. Various promises were made to call back with a resolution to NO AVAIL. WHAT A DISGRACE !!!