They did refresh the account and it didn't work. They said they are escalating the issue now as I have tried everything that's been suggested with no luck.
Having the same issue with my phone. Suddenly can't make it receive calls but can still text and use mobile data. Something is definitely up. No issues the 3 yes prior to today.
Pixel 6 user here. Suddenly unable to make or receive calls today. Mobile internet and texting works though. I have a support ticket going at the moment.