OVERBILLING, NO REFUND IN SIGHT, *******

MTN have been overcharging me for over 2 years, there is a reaccuring charge going through every month, i have called them, they say i need to go to a smtn srore,. In the last 2 years i have been to mtn store about 10 times, my query is never resolved, and the over billing continues. I know have 4 months left on my contract. I will pay there white collar ********s, but once my contract is up, i will be cancelling all 5 contracts and move over to another network