MTN not putting customer first - no answer on questions or upgrade - BAD!!!!!!!!

App**** for an upgrade 3 weeks ago. Made lots of calls to MTN. Some calls dropped and some calls never answered. Sent e - mails and left messages. When I accessed my account it shows my sim deactivated and actually my account is permanently closed????? There has been no communication from MTN on the status of the upgrade or my account???. Not even the retention consultants has a proper answer. Sizakele Mchunu why have you not assisted me as you have promised in our phone call?