6 months and still not sorted

This is my second complaint on Hello Peter. My mother upgraded her phone 6 months ago. The line simply does not work since this upgrade. Everyone keeps charging her for a new simple card as they say this is the problem. Surely after 6 months you realise there is a problem here. She has been paying for a service that does not exist for the past 6 months. No one at MTN could care less about this. No one can tell us who to speak to. This is a breach of contract on their part. When we suggested they just cancel everything because this is a waste of money they want to charge us a cancellation fee for something that does not work.