Sanlam/Direct Axis Failure to resolve the issue

Direct Axis and Sanlam Personal Loans have a terrible service. The call me every 15 minutes regarding the active loans that I have with them. The always tell me that my loan account is in arrears, this is after I have made arrangements with them over 3 months ago, and they I have been paying as per arrangement. They asked me to send them my Bank Statements showing all that they debited for the past 3 months, which I did over two weeks ago. They indicated that they will resolve the issue within 48 hours, today it 432 hours, still the issue is not resolved. Their monthly statements that they send to me show that they are recieving my payments....but the outstanding balance keeps going up. I am frustrated by their failure to resolve this issue.... meanwhile their Collections Department calls me every 15 minutes and threatening me about my credit record.