Poor Service from MTN

Was in the process of upgrading my current contract in April. It took them 3 weeks to deliver a phone which I never received. I phoned MTN constantly to cancel the upgrade because I want to cancel the whole contract. everyday I have to phone their Customer Care line just to listen to an annoying tune for an hour n half. When someone eventually does help you they only respond by saying its not their department and put you through to someone else. and that person can also not assist you <br> <br> I even asked for their supervisor and he said he will log a call for that department. Till now now response from them. what makes me unhappy is the increase in my bill from R559 to R618 to R720 and now its R820. Its contract and its suppose to be the same amount every month. <br> <br> I understand they are on strike BUT this service of theirs cant continue like this.<br> <br> Please help me to resolve this matter.<br> <br> ps. we do have an MTN in Vryheid but they still insist I must call the Call centre.