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This is primarily a user-to-user support forum; other Apple users like you. We don't have details of the exact reason. Contact Apple support. See the instructions in: If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support

As FixFifth posted "This is primarily a user-to-user support forum; other Apple users like you. We don't have details of the exact reason."