Pathetic customer service

I once had an account with sportscene taken out at cape town golden acre . I then lost contact with them and the account got handed over due to bad debt ...i then went back to the store to settle out the account ...was advised the outstanding balanace and then i made the payment there and then with the store agent . A few days later i then went back to the store to request for a settlement letter with regarding to closing the settled account.was advised to cal customer sercices, upon calling them i was told the account had been handed over to the lawyers and the payment wasnt suppose to be taken at the store. They then transfered me to MBD legal firm where i was then told that the account has been retrected by sportscene and is no longer with them and i had to contact customer service. I then called them again and laid a complaint and was told i would be contacted within 24hrs ...no call back or anything. All i am looking to get is a settlement letter ,what more should i do