You can use this service to reset your Battle.net password, which will remove most account locks.

Use this page if you wish to change/modify your Contact & Shipping address for your Battle.net Account.

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 cannot log in after you changed your password

How to update your password if you are getting this error message

What to do if you receive password reset mail without requesting it

Account has been hacked or compromised.

This is how to check if there is an error that the password is not correct

Information about password restrictions and requirements for Battle.net accounts