Bad service from MTN and after months of following up problem is not resolved.

After numerous calls to MTN my query is still not resolved. I don't have the time during the day to sit on a call and the problem is still not resolved. After disconnecting the lines and after reconnecting the date of my upgrade was done on the date the lines was reinstated and not the date the the actual contract was started. So my upgrade date is a year later and I am not due for an upgrade this year. Which I argue as the dater the should be the same and not when the reactivation was done. I have so many reference nrs for the calls I made to resolve this query and yet I have ne feedback on this matter. This is on all my contract and I am beyond myself with the poor service and feedback from MTN. Please can somebody get back to me on this. I have been a client of MTN for years and this is not the level of service I am used to but at the same time I must express my disappointment with the level of service.