DISGUSTING SERVICE FROM MTN

Atrocious service from MTN I've been in the store multiple times, called customer care, sent numerous emails to various agents, even sent a direct message on Twitter. I've been asking for help for months but nobody ever gets back to me with a solution

My problem: I have 2 MTN lines each costing R149/month I pay them at Checkers using easy pay and I pay them separately Example, R149 for line 1 and R149 for line 2 MTN has only been picking up the one payment (R149) and they've been cutting my line every month until I pay the amount that THEY'RE not picking up Recently I've also paid a few months in advance and obviously since MTN is not picking up my payments for a few months, my credit balance is incorrect

I'm tired of MTN not helping me and refusing to refund the money they've ****** from me I've sent in a slip for one of the months showing the separate payments but still nothing