Since you have wifi connectivity, I'm gonna suggest downloading a wifi calling app. I'm not 100% certain which apps are available for iOS but one for Android I know is called "textnow" ..it likely has an iOS counterpart. Anywho, these apps can keep you in contact with the world while this issue gets solved 👍
Hopefully this issue gets solved for you! It's not gonna make it any better really.. but you're not the only one suffering with this today lol
I just tried... thankful for Facebook for once, lol at least I can message in there 😊
I am hearing people have lost their internet as well and debit/credit isn't working either! What a mess!