Cell C service is slacking

My Cell C SIM card allegedly “expired” after losing signal going over the mountain, haven’t had service for about a week now and I’ve phoned customer care 3 times, each person telling me to do different things. Eventually got told that I have to go into Cell C and perform a “sim swap” and the network was down, waited a couple hours and went back and still no luck. My contract is ended soon and I won’t be back.