Why is my account disabled on iTunes or Apple store

See this Apple article:

If your Apple ID is locked or disabled

If your Apple ID is locked or disabled - Apple Support (CA)

Get a verification code and sign in with two-factor authentication

Get a verification code and sign in with two-factor authentication - Apple Support

Get a verification code and sign in with two-factor authentication

Get a verification code and sign in with two-factor authentication - Apple Support

 -> Scroll to From your iPhone, iPad, or iPod touch & follow the steps.

You need to sign in with your Apple ID 

See -> If you can't connect or sign in to iCloud

If you can't connect or sign in to iCloud - Apple Support