MTN cancelled sim of upgraded contract 60 days ago

I upgraded my MTN Contract on the 23-5-2015 with Nonkosi Yvonne Dlamini at SABC 0465 MTN Store - The Glen Shopping Centre M 15 A - Oakdene. My sim of my upgraded contract has been cancelled and has not been working since, I queried this now for 2 months, furthermore they have increased my bill for no reason by 50%.<br> Mutshinyani Matodzi [ MTNSA - Innovation Centre ] is in charge of my account and has frozen all information regarding my account, hence Cindy cannot access my account and not evan a sim swop can be done. I have been back to the brance three times to query this, I have emailed Mutshinyani Matodzi and Sindi Skhosana on many occasions with no response. One male employee told me he cannot help me I need to give him R 50 for a sim swop. I told him the sim is not damaged, is only two years old and it was an upgrade. He henceforth refused to help me, I then spoke to Cindy. Reactivate my old sim immediately.