Account Opened **********ly & no response from MTN

An account was opened **********ly in my name and I only discovered that almost a year later. The way in which I discovered was by an SMS I received from VVM Attorneys stating that my MTN account had been handed over. So I called VVM Attorneys to find out what this was all about. The agent at VVM Attorneys then advised me that I had an account with MTN (which I knew nothing about). Apparently I was owing well over five thousand rand. SO I told the agent that I had never opened an account with MTN and that this was clearly *****. The agent advised me to send an affidavit stating that an account was opened **********ly in my name. I did so and I also submitted a six signature sample together with my proof of address. Since then I have not received any communication from VVM or MTN to say that they are doing something. Instead all I receive is SMSes from VVM telling me that further action will be taken against me and that I must make an arrangement to pay for an account that I did not open and have not used. I have never lost my ID and same applies with my drivers licence card. I do not understand how an MTN account can be opened in my name without my physical ID document.