Bad Service

On the 2nd November 2017 i contacted RCS loans department for a settlement quotation the service was very prompt and i received my quotation within half an hour. i took the quotation to my bank ant the loan amount on the settlement quotation was paid in full the same day. on the 27th November it came to my attention that there was an amount deducted from my bank account by RCS loans i contacted their customer services department and ask them what was the deduction for they said it was an error on their side and i must do a reverse transaction on my account ant they will resolve the error on their side. now i keep on getting emails and sms messages stating that my account is in arrears and when i phone them to resolve the issue i hold on for hours without any answer from their customer service line