MTN is *****ing.

For almsot 2 years now MTN has been *****ing 100gb per motnh from me. Im on a 100gb day and 100gb night data plan but have been receiving only half every month, Paying R1000 for 50gb is ridiculous. If I get half I will pay half. Only fair. Thats over 600gb day and 600gb night in total. They have even admitted the problem insyore but there is just never a resolve to the issues. Not through the call center either. MTN is blatantly *****ing and I would just love to have some kind of legal recourse.