Sim swap rejection Cell C

I have never been so disappointed in my life. I have used cellc for many years and have always received exceptional service. I have been trying to do a sim swap with cell c. I have done it about 3 times last year by going to a cell c store and have never had issues with the security questions. I went again to the same cell c store i usually go to in Vincent East London and they were unable to assist me due to security questions being answered incorrectly. I asked them, so what can i do because this is my number and i really need it? She told me to call customer services. I called customer services but no luck at all. They asked different security questions of which I'm pretty sure of my answers are correct. Please, someone assist me, I desperately need my number back. What should I do when I can't get my own number back from Cell C. I have been using this number for years and am a very loyal customer. Please guys there's a lot of things I need my number for, please!!!