Is your Apple id disabled in the App Store and iTunes? There. Is something wrong with your account that cannot be fixed at your end. Please Contact - Official Apple Support for further help with this issue.
Is your Apple id not disabled but locked? See this:
If you see one of the following messages, your Apple ID locked automatically to protect your security and you can't sign in to any Apple services:
- “This Apple ID has been disabled for security reasons”
- "You can't sign in because your account has been disabled due to security reasons"
- "This Apple ID has been locked due to security reasons"
You need to reset your password to regain access. Find out how to reset your password.