Struggling to do a number change after I was told on several occasions it can ne done.

I did an upgrade on one of my devices. Upon upgrading I made sure that I can do a number change on the contract and they sent me a new sim card with a new number and said I can as soon as the contract ends do a number change to the prepaid number I was provided. I was told that there will be a R250 charge to my account for the number change and I agreed that it can be added to my bill. Each time I phone I get transferred from the one department to the other, eventually on Monday the 2nd I spoke to a lady and she said within 2 days someone will return my call and it will be concluded. I am still waiting for the phonecall.

I will be paying for this and it is not done for free. I just want it resolved.... Can someone please help me? What I was told and the service I am receiving does not agree....

So, can someone please assist me.....????