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

Blizzard Customer Support cannot lock your account on request

Information about removing an authenticator you did not attach

If you're seeing this message, check your email for details about the violation and a link to information on the appeals process.

Information on canceled game accounts.

What to do when getting an error that the Battle.net Account has logged in somewhere else.

Information on suspended game accounts.

Information on banned game accounts.

Information on banned game accounts.

Information about how to appeal a ban or suspension in World of Warcraft