You cannot login because you account has been locked

Hi there,

Please see this instructions

If your account has been disabled for security reasons

If you see one of the following messages, your Apple ID automatically locked 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 was disabled for security reasons"
• "This Apple ID has been locked for security reasons"

You need to reset your password to regain access. Learn how to reset your password. 

If your account has been disabled in the App Store and iTunes Store

If you see a message that says your account has been disabled in the App Store and iTunes Store, contact Apple Support for help. 

If your Apple ID is locked or disabled - Apple Support

Yes! And if this is not working for you, I would suggest that you Contact - Official Apple Support to let them help you with unlocking your account.

Hope this helps and have a nice day!