Is this on a Mac or an Apple mobile device?
What are you trying to do on the iPad when it tells you the ID has been disabled?
from a computer, test out that the ID is working properly by signing into the Apple ID management site:
https://appleid.apple.com/ (Click "Manage Your Apple ID")
Are you able to sign in?
Ok, When you see one of these alerts, you can go to iforgot.apple.com to unlock your account with your existing password ***** to support.apple.com/en-us/HT201487. After multiple unsuccessful attempts to unlock your account, your Apple ID will remain locked and you will have to wait to try again the next day.