What to do if you need to unlink your Activision account from your Blizzard account
Information on Call of Duty Account Bans and Restrictions
Call of Duty: Warzone is a new game mode of Call of Duty: Modern Warfare, and can only be installed separately if you do not own Modern Warfare.
Blizzard Customer Support is unable to assist with in game issues for Call of Duty
Cannot install or patch Call of Duty: Modern Warfare
Information about refunds for purchases of Call of Duty Points.
How to remove or change the phone number on your Blizzard account
Information for troubleshooting Modern Warfare in-game technical issues
Information on Blizzard Phone Notifications
Troubleshooting Error Code: BLZBNTBGS00000033: This account does not own Call of Duty®: Black Ops 4 / Modern Warfare