Over Charged for the last 6 months

If Anyone sees me taking up another contract with MTN, Shoot me dead!!!<br> <br> I have used MTN for more than 10 years, recently took 3 contracts in following years. Unfortunately, In the past 6 months they have been overcharging my account by over R350 and they keep passing the buck between departments when I ask for an itemized bill. Fortunately I now have all expiry dates for my contracts and two are in the next 3 month, I have taken the decision to cancel them and cut my ties with this Network.<br> <br> It is so frustrating that when the situation is like this they do not know who the right people are to seek a resolution. in the case where I had not been able to pay this extra charge in these months, I would have been blacklisted, yet they keep dragging it and ducking the dispute. <br> <br> There needs to be a method where we as clients can blacklist these suppliers for their horrifying service.<br> <br> ****ed, SOON TO BE EX MTN CLIENT