Apple ID not supported
I signed out of my Apple ID in the App Store by accident and now when I try to sign in again it says Apple ID not valid or not supported. How can I fix this?
iPhone 7, iOS 14
See the Apple Support article(s) below.
Contact iTunes Support for assistance. See the Apple Support articles below for contact information.
Apple Support schedule phone call
If necessary, try Twitter
https://twitter.com/AppleSupport. People have posted it may take an hour or more to get a response.