We had sent a Private Message to continue the discussion related to your service issue. This query is specific to an individual account, so we will need to continue in Private Message to fully resolve the concern. Please contact us if you still need support.
If it's only WiFi Calling which you're having a problem with, it's possible you've got an IPv6 conflict. See the thread linked below:
https://community.verizon.com/t5/Apple/Wifi-Calling-Issue-on-IPv6/td-p/1803522
What's the make/model of your phone? If nothing at all is working on it, could be the hardware on it is going out.
We know it's important that your service works when you need it. Are you only having this issue at a specific location or does it happen no matter where you are?
-Meg