Blizzard or game account hacked or compromised.
Changing language settings for game and/or communications from Blizzard
How to move a game account to a different Blizzard account
You can change your BattleTag in Account Management.
How to consolidate multiple Blizzard accounts into a single account.
How to move a Hearthstone account off a Blizzard account
How to update your date of birth for your Blizzard account information
Playing Blizzard games on more than one platform.
If you forgot your Blizzard account email, you can use SMS Protect to find your account.
Change your Blizzard account email address.