Hi @englebert,
Welcome to our Community Forums! Thank you for your first post and I'm very sorry to hear that you're having some issues using your WiFi Calling at the moment!
You can read more about WiFi Calling on our website for more information about this topic. You can also take a look at our website for information about how to Set Up WiFi Calling. However, as @BenMcr advised, we can enable this for your through our systems.
I'll be more than happy to help you with this. To help activate your WiFi Calling, I will send you a Private Message. Please keep an eye out for a purple envelope at the top right corner of your Forum page. I will be in touch soon.
Thank you.