Where are you locked out of your account? iCloud? The App Store/iTunes? Does the ID work anywhere?
If this is in the iTunes/App Store, see the 3rd link.
If your Apple ID is locked or disabled - Apple Support.
If you have changed your ID or password, have you followed the steps in this article?
What to do after you change your Apple ID or password - Apple Support.
If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support.
Contact iTunes Support for assistance. See the Apple Support articles below for contact information.
iTunes Support – world wide
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.