How do I unblock my iCloud so that I can buy cp in call of duty mobile

This is primarily a user-to-user support forum; other Apple users like you. You will need to contact Apple Support. See instructions in: If a message says 'Your account has been disabled in the App Store and iTunes' - Apple Support

Click the "contact Apple Support" below in the instructions from If a message says 'Your account has been disabled in the App Store and iTunes' - Apple Support

If you see a message that says "Your account has been disabled in the App Store and iTunes," contact Apple Support for help.