Blizzard or game account hacked or compromised.
How to remove or change the phone number on your Blizzard account
Changing language settings for game and/or communications from Blizzard
If you're seeing this message, check your email for details about the violation and a link to information on the appeals process.
Requests to change the country / region of residence on a Blizzard account.
How to change or update a Blizzard account email address.
How to move a game account to a different Blizzard account
You can change your BattleTag in Account Management.
Information on how to change the registered Blizzard account holder name
How to resolve being unable to log in due to this error