NEDBANK wants criple the finance of good PAYING CLIENTS for no reason

I have a Nedbank loan for a long while and NOT once have I skipped a payment. All of a sudden with no cause or justification they handled me over to the collections department and now they sending me sms,s that I am in arrears which again I am not. They deduct from my account every single month. Now on the 25th of March they sms says they going to double debit me, why ? I AM I NO ARREARS. I tried to call them and their agents just keep transferring me to wrong departments until I am eventually told they closed. This I have proof of on a recorded line. Their agents are suppose to be fais compliant but they not treating clients fairly according to the regulations set by the FSCA..They cannot put me into financial stress when there is not need for it. Again I have never ever missed a payment and their sms says that I arranged this double debit collection with them. All my calls are recorded and will be sent the NFO and Fais Ombud when needed. How on earth can you put someone that has never skipped a payment on a payment plan. This is even messing up my credit score.