Faulty sim card

Last week we received a new sim card from Cell C and the sim card does not work. We called the call centre and we were told that perhaps we need to get it activated and I had to then call the relevant department to get it activated only to find that its already activated yet the sim xars still doesn't work. So today we went to cell c and they tested the sim card and it wasn't working so we were told that we would have to pay R150 to geta new sim card . Imagine! !! Cell c did not hesitate to deduct money from our account yet we are stuck here with a sim we cannot use and webhve to pay for a different sim? I think not! . I've been using Cell C for years and after this. I am done with them. Im cancelling the contract.