Billing query unresolved

Good day, i am having endless problems with MTN since last year August, on the number *** they are billing me incorrectly and they have been promising to rectify th problem but even now nothing has been done all they are doing is sending me from pillar to post, i am having countless reference numbers that have not been attended to, the last two ref: numbers are *** and *** and it has been allocated to different people and everytime i send an email a new person who keeps on promising to resolve the query and doesnt do anything, people who have been in contact with me with no resolution are<br> Laeeq Paulsen<br> Nosithembele Nabo <br> Sesethu Kolweni<br> Mukani Dube<br> Melisa van Jaarsveld<br> Nimita Reddy who sold me the package<br> Mafika and many more and no one has helped instead my line is locked and Laeeq sene me an email that my account is locked due to arrears, is there anyone on mtn who is competent enough to solve this easy query and I want this line to be canceleed asap this is too much<br>