No service delivery at Cell C

I am still battling with CellC. This is now more than 3 weeks since I've done an upgrade on my data contract. The day it was done, I was advised not to order a new sim card. When I wanted to connect later that evening (after my upgrade), I could not. When I phoned CellC (which took 24 minutes), they said that I needed a new sim card. I actually wanted to cancel this contract, but relented. The next day, someone promised to have the new sim card delivered to me. During the course of three phone calls, this was communicated to me. On Monday, 22 April, an operator asked me to buy my own card and they will do a sim swop for me. The person even gave me his email address: I must send him an email (to ********** the moment I have my sim card. Needless to say, I've sent three emails up until now, but no response. Yesterday afternoon, Sandile phoned me: she will help me with my sim swop first thing this morning, she will phone me at 08:00. Up until now, still no one has phoned me. I am so gatvol, I cant even start to describe my feeling. I wish there was someone who can help me, but there seems to be done. They are good at adverti*****ts and to do upgrades, but there is no, but NO service delivery. And I wish I can just cancel the whole contract, but that is also impossible, as no one will be able to help me. I think CellC sucks big time. Do you hear my frustration?? No stars for you. Only demerits.