I'm sorry to hear about the issue you are experiencing with your phone service. It sounds like you have already tried several troubleshooting steps, but it may be helpful to try a few more. Here are a few things you can try:
Check for any network outages or maintenance in your area. You can usually find this information on your service provider's website or by calling their customer service number from a different phone.
Try resetting your network settings on your phone. This can usually be done by going to Settings > General > Reset > Reset Network Settings.
If you have a physical SIM card, try removing it and then reinserting it. Make sure it is properly seated in the SIM card slot.
If none of these steps work, you may need to contact your service provider again when they are open for technical support. You can also try reaching out to them on social media or through their website's chat function if available.
It's understandable to be frustrated by this issue, but it's important to stay calm and persistent in finding a solution.