Bad treatment from TFG

My mother lost her phone and when she went to do a sim swop she was told that the sim belonged to Foschini. Now that was understandable as my father, who since passed away had an account with Markham and had registered my mother's number on some programme which rendered the sim as belonging to Foschini. Now there is a process that she had to follow and was told by Foschini that she can do the sim swop but up until now she is being taken from pillar to post and this is taking it's toll on her as she is elderly. She keeps getting calls from TFG telling her the issue has been sorted but when she approaches MTN she is told that Foschini has not released the number. This has been going on for more than two months now. This service is very poor from TFG.