Locked account

See this document If your Apple ID is disabled https://support.apple.com/en-us/HT204106  "If you or someone else enters your password, security questions, or other account information incorrectly too many times, your Apple ID automatically locks to protect your security and you can't sign in to any Apple services.

Apple ID Has Been Disabled

1. If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled
2. If your Apple ID is locked or disabled - Apple Support
3. If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple …
4. Apple ID is Disabled - Apple Club
5. Apple ID- "This Apple ID has been disabled for security reasons" alert appears

Contact iTunes Support using this form or scroll to the bottom of this page and follow the screens until you find a chat and/or telephone option.  Pick any problem to select an option.