Q: I have to do to re-activate my ID

I don't know what exactly you are referring to, but have a look at this support document. It will answer all your questions about managing your Apple ID.

Managing your Apple ID - Official Apple Support

What is happening? Are you seeing a message saying your Apple ID has been disabled?

Maybe your account is not in good standing with Apple, or maybe they believe it has been compromised. Contact Apple to find out : https://getsupport.apple.com/

Changing the password reenables an account which was disabled automatically for security reasons. If your account was disabled for any other reason, contact Apple.

Quoting If your Apple ID is locked - Apple Support :

If you see a message that is different from the alerts above [which are all about an Apple ID being disabled automatically for security reasons], contact us for help.