No response after Sim Swop can't be done

On Friday the 23rd my Dad went to a Cell C store since his signal was gone for 2 days. He was told that the simcard was damaged and that they will have to do a simswop. I got the Rica number from him and phoned Cell C Customer care to do the simswop. I was told it couldn't be done, but they will look into it and phone me back. No one phone me back. On Saturday morning I phoned again, and was told that the sim they got from the Cell C store was not released from the warehouse yet and that they had to go back to Cell C and get a new Sim.I phoned Cell C while they were in the store and yet again it said that the sim was not released from the warehouse, but Cell C will phone me that afternoon as this will be escelated and resolved before the next morning. Again, no one phoned. On Sunday, I phoned again.The second person I spoke to tried to do a sim swop again, and told me it still gave the same error message, but that she will check with her manager and phone me back shortly. Monday morning, no signal on my Dad's phone since Wednesday. No reply from Cell C after I was promised on three different ocasions that my call will be returned.