Wrong billing

*I could upgrade on my mtn contract. I did go into the store and the guy help me to upgrade. The first months bill was heavy high and we go back to the store to see why it is so high. They check on the system for us it shows that we have a mtn choice 100 minute contract but the documents we have was for a mtn choice 200 top up. We took all our documents to the store and the guys had a look at it and told us they will correct it on mtn side and refund us our money. The month July it happend again we did go back to the store and they have a lot of excuse and was very rude. I would like to cancel my contract with mtn i cant pay for mtn mistakes. They never come to light and never get back to us. I am very upset with the service i recieve from mtn i will never go to mtn in menlyn mal!!<br>