Number deactivated by service provider

My husband's number was a contract with Foschini group. On 18 September the sim card lost service. Displaying sim not registered on network. After two months of struggling with Foschini group for a sim swop, Foschoni group confirmed that the number is no longer on their system. It's on MTN prepaid after my contract ended on the 14 September. <br> <br> MTN call centre still insisted the number is still with Foschini group. The past week we finally got through to a gentleman who explained to us that the number is on MTN system, however it is inactive and needed to be reactivated on the network. He then logged a query USD ***. When we did a follow up yetserday, the response was the number is not active on a system called SORB.<br> <br> That sort of response is really not helping because the whole reason for the query to be logged was for a reactivation to be processed. I as an MTN subscriber do not understand all these system problems that the MTN people don't seem to be interested in helping me with. What does a person like me need to do to be acknowledged and finally get some assistance. My husband has had that number for years and to change it now would be such an inconvenience.