handed over to legal and name was black listed

October 2014 I phone vodacom's contract division notifying of my contract, account nr ***-1 cell nr ***, that the contract will expire at the end of November 2014 and that I will not renew this contract and that it will come to a end on 30 November 2014. I did receive a letter via e-mail stating that this contract has come to an end and that the account will be closed. I phoned customer care in December to make sure everything was cancelled and the operator , Tozame confirmed that no monies was outstanding and that the contract/ account was closed. February 2015 I received a e-mail stating a amount of R280 was outstanding. I phone and was told that I was handed over to legal and my name was blacklisted. I spoke to the Legal department and the operator Hope also confirmed that I was handed to them and he went into the account to see what the problem was. After many calls I was told it was a mistake from Vodacom's side and they will contact Credit Bureau to have my name remove and that they will send me a letter confirming this. February 26 I phoned again and was told that in 48 hours they will e-mail me the letter as proof that my name was cleared . on the 10th of Mar