Cust Service to link payment to correct account

My car is in arrears that is one issue, but there is a R 5100 payment made 29th January on my old car account *** that is not reflecting on the correct vehicle.<br> I have phoned in 3 times since last week and this week for that to be linked to the correct account which is ***. Three different agents phoned me and have not successfully linked this payment.<br> How many people does it take to link a payment? I want this done asap, you are charging me interest on a payment that has been made ! Contact me asap and sort this out.