********l blacklisting by Vodacom

I have been blacklisted by Vodacom for a phone and contract I do not have. A consultant contacted me via cellphone last year in August giving me a phone contract, on receipt, I realised that it was not my preferred phone. I immediately contacted them notifying them I was returning the phone via currier services. on 27 March 2015 I received a call from Vodacom lawyers informing me that Vodacom has handed me over to them for none payment. I explained everything that transpired then and the lawyers advice that I send an affidavit explaining what happened. same I then emailed an affidavit as requested. A week later I called the lawyers to check the progress of the case and I was told that the matter was referred back to Vodacom legal department. I called Vodacom legal department to follow up, I was told that they are aware of the mistake and they will ensure that the account is closed, which was closed as promised, Also the letter would confirm that the my name is cleared at credit bureau which never happened. Every time I call Vodacom I am told that they will revert back to me. This has affected my credit record. I am sending this to you to help me find a solution. regards .