Security question

See this article If you forgot the answers to your Apple ID security questions - Apple Support

See the upcoming screen shots -

Then open a new tab on your Mac ( use command and T keys on the keyboard ) , enter your rescue mail address and its password in the beginning when you created an Apple ID , you will receive an email see this screen shot , type this code in the above screen shot and click on continue and then a window will appear showing questions and answers , select the drop down arrow for each question and type the new answers for them ( there are three questions ) and click on continue and then change .

See this screen shot also .

You can also try Apple ID Support.

Apple ID Support

Apple ID Support (2)

Apple Support by e-mail or chat Select your device, Battery, Power and Charging, then Power adapter not working to get a chat option. If the initial contact can’t help you, ask them to have someone who can help contact you.

Apple Support using Twitter

Or fill out and submit this form.

see these links If your Apple ID is locked or disabled - Apple Support

Contact Apple for support and service - Apple Support

Contact - Official Apple Support

The last screen shot is added two times please bear it .