Vodacom Number Cancellation Complaint

I phoned in on 6 April to cancel two of the numbers on my contract. The one number was converted to pre-paid but up until today I am struggling to get the other number cancelled. I phoned in again on 15 April to find out what is happening with the other number that need to be cancelled. I was told that I spoke to a different consultant. The consultant I was busy talking to went to the supervisor to find out what to do. The consultant came back and said that they will listen to the recording of the first consultant and that I will received feedback before the end of the day. I received no feedback. I sent numerous emails (15 April and 20 April) to *** to find out what is happening. I receive an email back asking for some security information and that is where it stops. Only one person responded to one of my emails just to tell me to contact cancellations again, which I did. The consultant even upgraded to main number without me asking. I need confirmation before the end of the month that the number has been cancelled. I have been with Vodacom for many years but they have the worst customer service when it comes to cancelling contracts.