CAN SOMEONE WHO KNOWS WHAT THEY ARE TALKING ABOUT PLEASE CONTACT ME!!!!

I have a cellphone contract which expires on 28/09/2017. I called customer care a few weeks ago and stated that I want the August Wifi deal and will not be taking a phone. I was unhappy with the feedback at that point and ended up having to Helo Peter Cellc now I'm back again regarding the same complaint! I have a recorded call where it was agreed that once my contract ends in September my cellphone contract number will be converted to prepaid and I will receive a new SIM with my modem which will be the new contract number. I explicitly stated that I want to keep using my number and cannot insert it into the router. Customer Care knows nothing about this! Very unhappy - I now have to lose a number that I had for 10 years due to incompetence!