Still no Resolution - MTN *****ing my money!

This is now the second Hello Peter report that I am writing. MTN responded to my first report, once again admitting fault - but still no follow up or Credit has been passed on my account. <br> <br> MTN continually overcharges my account. When I can get through to the call centre, they admit that they have overcharged me and promise to rectify and credit my account. Three months ago I did even receive a credit, however the same over charging issue persisted and I am now due further credits. I have called the call centre and been in email communication with MTN Customer Care - but am still deeply unsatisfied and out of pocket! Getting through to the Call Centre is impossible!<br> <br> MTN - contact me directly on my cellphone - you need to sort this out before I escalate to further action.