Mr Price bad service

I email MRP from September 2018 to close my account and requested to cancel the monthly card fees, customer protection plan and lost card fees. and to date I had no reply. The onky email I received was that I can not cancel the services cause i have it long...... Really make no sense. I've explained my problem almost every month telephonically to the consultant. Clearly they not interested in how to solve the problem. I made a final payment in December 2018 of R850 and explained why I'm not paying the balance of R140. 46. I foward client services proof of payment and sent an email advising that the payment I made is my final settlement payment. But clearly MRP did even investigate as to why i short paid and handed me over. This now affected my credit score. Not happy at all with MRP