Terrible customer service

I'm very disappointed with the service I've been receiving from Cell C call centre to say the least. I've had to perform countless sim swaps on my number because the sim card would just decide to stop working after every sim swap I've requested. Every call centre agent I spoke to has given me different information which some you can tell they just telling lies to get rid of me. I just got off the call now with a lady by the name of Nomagugu and she was very rude for someone that service customers. To date, no one can tell me why my sim card keeps "crushing". If this is how Cell C treat their customers, I'm really done with you