Contract ended,unable to migrate to Prepaid

I called in a day before my contract ended, I was advised I need to call on the day. I then called on the day of my contract end and requested to be moved to prepaid. I was advised 3-7 working days to move my account to prepaid. 10 days have now passed and still NO move to pre-paid. Amazing how you can port so easily between networks, but Mtn cannot release my number as I want to move to pre-paid and then leave to Vodacom. Zayaan is a call centre manager I spoke to, up until today, no feedback. Jay Govender is the other person I dealt with, months have passed and no feedback. Mtn is a complete *******.