Blizzard or game account hacked or compromised.
How to remove or change the phone number on your Blizzard account
Requests to change the country / region of residence on a Blizzard account.
How to resolve being unable to log in due to this error
How to change or update a Blizzard account email address.
How to move a game account to a different Blizzard account
Information on how to change the registered Blizzard account holder name
A BattleTag™ is a player-chosen nickname that identifies your Blizzard account
How to consolidate multiple Blizzard accounts into a single account.
How to correct an email mistake when creating or updating your Blizzard account