Who in MTN wants to help me?

I am an ex Nashua Mobile customer. My contract start date was October 2013 for two years. When I contact MTN now, it is suddenly 4 November 2014 when my contract was migrated from Nashua to MTN. I got the original contract from Nashua. Mailed it twice now to MTN. Spent hours on the phone. Been made loads of promises of callbacks. Still no service. Apparently - it is complicated! This stems from a previous phone number that I had with Nashua that they still revered to in their documents. It has not been used in a long time. What is difficult about that? I really don't know who to contact there any more. I am afraid of knocking someone's lights out at MTN. I am so frustrated. Is there anyone out there who are possibly interested in helping me?<br> Thank you