Settled account

Yesterday I spoke to Lauren from the legal account department. She advise that the account was settled and show a zero balance. Then she came back and said I still own R850. I advised her then that to my knowlidge the account was paid up. I phoned the company that delt with the matter, they said that the account was handed back to vodacom as it was paid and they cannot issue me a letter as the account is with vodacom and they need to remove the status. Know I cannot apply for a new contract as vodacom cant do their jobs and still get blacklisted because they are to lazy to work.