Investigation that's taking forever

My contract was billed R250 for a number on my contract I knew nothing about. When I went to mtn they gave me the run around. It's been three months,almost four months even. I've been told that the case after the investigation "is still open".

This has dragged on for far to long.

I keep getting this text below ,but nothing has been sorted. "Dear Customer, Your query has been escalated with reference number 1- ********** 6534. Thank you for using MTN. Have a Yello day"

This is by far the worst I've experienced from mtn. The consultant keeps saying ",I'll call and let you know how everything is going". Then I have to end up calling and finding out because the person kept forgetting. I'm ****ed off. MTN Sandton store...