Worst service ever

MTN has got to be one of the worst service providers. They do not have their admin / billing in order. Every month I have an issue. If they are not upgrading their systems and incorrectly blocking me, then they incorrectly bill me. <br> I have to call in to get a consultant to confirm that oh yes you have paid we have debited your account and sorry we will unblock you, its due to our system upgrade, which happens every second month. Then when I ask how can this be fixed I get the answer that unfortunately it is that way and they can do nothing about it. every time it happens I must just call in. This is not a solution. <br> I have requested a block on my data, how hard can this be, every month I get surprise bills exceeding thousands. <br> Please MTN just cancel my contract I actually cannot deal with such aggravation.