Number Swap taking forever and Agents clueless on turnaround times

I would not have liked to bring this issue here but MTN has been frustrating, I have been taking from pillar to post, just for a number swap for my contract. During the application process of the contract , I asked the lady assisting that can she make sure my number is ported from prepaid to the contract number to be used, and she advised that when I receive the call, i must call MTN and ask for a number swap, 1 week later and all of the call centre agents are saying different things, the first one said it would take up to 48 hours, the second one said 4 working day, the third and fourth said I must wait till Friday, the 5th consultant today told me I need to wait 7 working days again? are all MTN agents singing from the same hymn book or are there different rules? I escalated the matter and no feedback has been given, the agent I called today told me the query is hanging in the Back office with no one to attend it. I really thought this would be a smooth transition but all I see myself doing is getting fully billed for a device that is sitting in a box not being used.