UNPROFESSIONALLY PASSING THE BUCK - UNACCEPTABLE

I am very upset with the unprofessional and inefficient attitude that i am receiving from Game. My account was in arrears and handed over to the administrators (MDB), I called the administrators who gave me a settlement amount and Game banking details. I paid the account in full with R7371.25. After 5 days of settling my account, Game handed me over to another administrator (VVM) who now has increased my debt to over R8000. I am now trying to get a settlement letter from Game and they are not willing to give me the settlement letter, yet they can see and confirm that my payment reflects of the system. I spoke to a Credit Manager called Keenan who was passing the buck and referring me back to the administrators. The administrators are adamant that Game must give me a settlement letter as my account has been settled. This is frustrating considering the fact that i paid my account in full and not owing them a cent. All I want is to receive a letter confirming that my account is paid up and for Game to revoke my account at the lawyers because this has a bad credit rating for me yet I do not owe them anything. The credit department failed to check their books before handing over.