RCS Group can't get their house in order

I have been trying desperately to resolve an accounting issue with RCS Group without any success. The company has debiting my account with unauthorized transfers for the past three months. I have tried to take up the matter with their loan department as well as their credit department, but despite speaking to several consultants, and sending half a dozen emails (not to mention several hours on hold), I have not had a response. Each time I've got through to anyone, they've assured me they'll look into the matter - and then they never get back to me. I have now been advised (by sms) that my credit card is being handed over for collection - when by my estimation, RCS has debited over R10,000 in extra debit orders. I've forwarded a mail with my two-month email chain to their debt collection agency - ARA Group - and they haven't responded to me either! I realize that there is probably a technical error in the RCS system, but none of their team seems able to assist. I do not have the additional funds available to pay these extra costs, and I am now resorting to desperate measures to try to get someone to respond to me.