Bad service

I have been with Cell C for about ten years now , but is happening currently I don't like one bit and I will be considering after my contract ends moving elsewhere , I have a simcard that has not had any mobile network for 5 days now and query was logged but I didn't get any assistance. What am told that I need to buy a new simcard that I have to pay for simswap for a problem I don't consider mine other simcard work properly clearly its with the simcard I'm using as the consultant say..am not happy that I have to pay for that it's your network sort it out am paying for you to service me in exceptional manner because come month end you get your money in my account.. what is point of having simcard that doesn't have network .if I were able to pay the remaining balance off I would today ..#unhappy customer