Hello,
For help with an invalid/not-active/not-supported account you need to contact Apple.
To reach Apple Support for an account issue:
1. Click here --> https://getsupport.apple.com/?caller=cups&PGF=PGF63005
2. Select: Disabled Apple ID
3. Select: ”The Apple ID is not active" alert
4. Select: “Continue”
5. Select a chat or telephone call option.
or:
Contact Apple for support and service by telephone --> Contact Apple for support and service - Apple Support
● According to various posts, Apple may also permanently lock accounts for various reasons (very broadly outlined in section VII-B of Legal - iCloud - Apple ). If none of the above apply to you that may be the case here. If it isn’t apparent, contact Apple and ask if that is the situation, but don’t expect them to tell you why.