How do I get my number back?

I am writing this in the hopes that someone at Cell C cares enough to help me get my cellphone number back. My phone was ****** last weekend and I reported it to blacklist my number: *** last Sunday & requested a sim swap. The lady on the phone went through the process with me and told me that the sim card would be working within 48 hours and was given the reference number: ***. I phoned again on Tuesday to find out why my new sim card was still not working. I was told that I should try again tomorrow and it would work. On Thursday, it still wasn't working so I phoned to follow up. The lady on the phone said she needed to verify my details and proceeded to ask me security questions, that I failed twice and she said she needed to open a CASE?!!. I answered the questions as accurately as I could, so I have no idea how I failed! The lady sounded off from the start and I have very little trust that she wanted to help me at all. I am self employed, every day I don't have my number I am losing clients and losing money. I will change my service provider back to Vodacom if I don't get any resolution. My time and money has been wasted on what should be a very simple process!