iPhone 6s iCloud disabled

If the message states that your Apple ID is disabled for security reasons see: If your Apple ID is locked or disabled - Apple Support

If it states that it is disabled in the App Store and iTunes, contact Apple support. See: If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support

Someone here may be better able to help if you reply with the exact wording of the message.