Unable to login

contact Apple ID Support. Based on multiple posts I have read, they may not be willing to help. See the Apple Support articles below for contact information.  

Apple ID - Official Apple Support.    

Contact Apple for help with Apple ID account security - Apple Support.   (Link doesn’t always load)  

Get Support          Work through the screens to get a chat option. 

Apple Support schedule phone call

https://twitter.com/AppleSupport.          People have posted it may take an hour or more to get a response.

From the Apple Support article below. 

Without proof of your identity via security questions and other carefully selected criteria, Apple Support can't help you reset a password or perform any other actions on your account. These policies are audited and reviewed on a regular basis.

Security and your Apple ID - Apple Support.      

Device or computer?

If a device

Passcode - If you forgot the passcode for your iPhone or your device is disabled.      

Passcode - If you forgot the passcode for your iPad or your device is disabled.     

Passcode - If you forgot the passcode for your iPod Touch or your device is disabled.

If a computer

User Password Reset.   

User Password Reset (2).         

User Password Reset – Apple ID.    

Which above one? To have it be like a new computer, do a backup, preferable 2 separate ones on 2 drives. Boot to the Recovery Volume (command - R on a restart). Run Disk Utility/First Aid. Reformat the drive using Disk Utility/Erase. Use Mac OS Extended (Journaled), then click the Option button, and select GUID. Quit Disk Utility, then re-install the OS.

Reinstall from macOS Recovery

OS X Recovery

When you reboot, use Setup Assistant to restore your data.

What are you doing specifically when this happen? Message received?

Device or computer?

You are welcome. Good luck.