NO NETWORK SINCE WEDNESDAY

My phone stopped having network on Wednesday the 2 Dec15 I decided to call cell c on Friday the 4 Dec15, and spoke to a lady whom advised that there is nothing wrong with my line and that I should try and remove the sim card and put it in another phone to see whether the problem is with my sim card or with my phone.I called back and spoke to Donald and advised him that my sim card is the problem and whereby he advised that Cell c is having a problem and the technicians are trying to resolve these issues.Today I called back and spoke to Helen/Ellen whom advised that my sim card is damaged and that I should go and do a sim swap whereby I will be held liable for the cost as the sim card is damaged she then advised me that the issues with the technicians has been resolved and that the sim card is the problem. I asked her how does ones sim card get damaged she advised that when you remove the sim card from the phone I told her that the sim card has never been removed since the person at the dealership put the sim card into the phone. I am not willing to pay for something that was not my fault