Frustrated by motor vehicle account system

I have an vehicle account with ABSA, I have getting calls from call centre agents letting me know that I have not paid installment of my car. i have been calling several times trying to get this issue resolved. The last call I made , ********** 503, on 31 on August 2018 i was assisted by the agent called Daniel who was very nice and he discovered that the reason the debit bounces back it because on the system it shows my account it savings while my account is cheque. He advised me to deposit the money to account number : ********** 1274 he will send the request to another department to update that my account then from August month end they will be able to deduct from account. Today at 14:16 I received a call I was told I have not paid the installment for the car. Its really annoying to get such calls because I have the proof of payment that I made on 31st of August but ABSA system still shows that I have not paid. Is there anyone who can attend to this issue and resolve it expect because they are relying on the system that is not telling the truth about my payments. I have been calling you call center several times now with no help. This is really frustrating as it also affects my credit record. Please please can anyone attend to this and resolve it!!