Bad Service

I am really disappointed with their service from last week Friday my SIM card had no signal , upon enquiries someone tells me about sending an sms how do you send an sms to a SIM card that doesn’t have a signal. Then they tell me that maybe the SIM card is damaged how? Cause this SIM card is a data only SIM card that is always in a router how does it get damaged? I am now expected to do a sim swap all that routine paperwork and everything and no one seems to care. The service leaves a bad taste in my mouth.