NUMEROUS BILLING/ACCOUNT ISSUES - NO RESPONSE

After having numerous issues with RCS, I paid up the outstanding amount on my RCS card (according to the lady who contacted me from their Creditor Department) in full on the 11th January 2018. Upon pulling my credit report today, I see there is still an amount of R2,147.00 outstanding. How is this possible? Please provide me with a statement ASAP. It is extremely unprofessional to state that X-amount is the full outstanding balance and then, upon having paid the amount, realizing there are still monies outstanding. Proof of payment was also sent to RCS. However, RCS is clearly not able to open or read any additional documents you provide them, as I have learnt.