Contract put on prepaid

My cell phone contract was upgraded 2 months ago, on Sunday my number was cancelled and put on prepaid. My second contract (which I don't use) came to an end in July and was supposed to be migrated to prepaid at the end of the contract period was loaded with airtime and data.I contacted customer service on Sunday and reported it. I phone again on Monday, Tuesday, Wednesday, Thursday and Friday each time explaining the situation. I was told that the call was logged to the person who had made this mistake. By Wednesday it was escalated to the Supervisor. Today I asked to speak to a manager because obviously the supervisor was doing nothing. Needless to say it has now been 6 days and I have had no response from MTN about correcting this situation. In the meantime I cannot make any calls, emails, whatsapp etc because I have no airtime and no data for a contract that costs me over R1000 a month. <br>