Overcharge Each Month

I am VERY disappointed in how MTN is doing business. I have been a client with them from Nov2014 and have been overcharged on my contract from month one. I am being charged for bundles that is supposed to be included in my contract. Every second month I need to visit a store and after waiting an hour or more ask for my money back. They reverse the issue and then next month the same thing happens!!!!!<br> I've talked to customer service several times, but most of the people there are so *********** that one month my banking details was changed when I explained what is going on. i have have asked to cancel my contract but they said that I will need to pay the cancellation fees!!! But this is not my fault at all. And they are breaching the contract. For such a huge company I would have expected more.