Account has been hacked or compromised.
Change your Blizzard account email address.
If someone changed the email address on your account, or if you can't remember what it was, we can send you a text to recover your account.
What to do if you think gold is missing from one or more of your characters
What to do if the account of a friend or family member was compromised.
What to do if a friend or family member has access to your account and has updated the account details, are preventing you from accessing the account, or has taken gold or items.
Is your character missing after you purchased a Character Transfer or Faction Change?
How to update the email for Parental Controls.
How to change or update a Battle.net account email address.
How to correct an email mistake when creating or updating your Battle.net account