iPhone says my iTunes and App Store are disabled

According to: If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support

"When you see the message, don't try to edit any of your account information. Instead, contact Apple Support for help."

As users on this forum, we couldn't possibly know why. You need to do what this link says and contact Apple Support for assistance: If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support