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.
It is not possible to merge the progress of two or more games into one.
How to move a StarCraft II account off a Blizzard account
If you forgot your Blizzard account email, you can use SMS Protect to find your account.
Playing Blizzard games on more than one platform.
How the silence penalties work