What can I do to fix it
what I can do to fix your phone when it says your phone has been disabled from App Store and iTunes
iPhone 8 Plus, iOS 14
According to: If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support
"Contact Apple Support for help.
If you see a message that says "Your account has been disabled in the App Store and iTunes," there might be a problem with the payment method that you have on file.
When you see the message, don't try to edit any of your account information. Instead, contact Apple Support for help."