Steps to help you find a missing ticket.
How to create an account to play on the Public Test Realms
What to do if you receive an error that your code is already claimed in your account.
How to contact the Blizzard legal department.
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How to resolve this error when adding your phone to your Battle.net account
Types of issues Blizzard Customer Support can help you with on Activision games
What to do if you receive this error when adding your phone number to your Battle.net account