Bad service

My tablet is now off the network for more than a month. The only answer that I get from the MTN store in Festival Mall is that the number was migrated to a new system and that there is nothing they can do for me. I have to go to the MTN in Greenstone or elsewhere. Why? I was not informed that this was going to happen. Why do I have to run around for something that they did? Data that I loaded is just missing. This is the worst service that I have ever received. I will definately move my contract to another provider.