Mtn south Africa call centre has horrible customer service

I have bought data for R400 beginning of this month till today the data does not work at all. I was advised by a consultant to buy a router for the type of data I have purchased, I was told I could transfer to a new SIM . I spent another R400 buying a router that works with other simcards and not mine so again my data plan is a problem. I have been calling mtn everyday since the problem started they refuse to refund me, they keep saying they are escalating the matter I never get feedback, sometimes my calls get cut n I have to call again and spend hours on the phone being transferred between departments and holding for supervisors that never actually take my call. I have spend over R1300 since this problem accrued and till now no resolution .The data will expire in a few days and still doesn't work. I was better off using Telkom LTE