Poor Service

I called Telkom Retantion to close off my device for the remaining months ,they gave me the amount i need to pay as well as the account number where i need to make the payment ,i made the payment on the 26th and when i call them again to check if they received the payment ,they saying they haven't and the account number is correct .I then sent an email to *** they gave me this ref number but never got back to me ,and when i call they dont have answers for me like what the hell Telkom is full of nonsense and their service is irritating they keep on transferring from Retention to billing department to the store , you can just imagine the frustration