This month I tried to log in my WoW account upon doing so it told me I needed to put in a battle net account which I didn't have one at the time so I made one and clicked on the merge WoW account and said that the account was already merged with a battle net account. Then I sent an e-mail to Blizzard telling them my account has been compromised, but a week later Blizzard e-mailed me back saying I need to use the e-mail address that I'm registered with but for all that I know the person that stole the account also may of changed all the info that was on my account. Today I checked the armory to look at my characters and say bits and pieces of their armor was missing so I know for a fact someone did steal my account. In total I had over 25kg on all my characters so whoever stole my account is probably having a field day. This is how battle net has helped to get my account stolen because I can't access my account in an way or form since my account infomation was changed by someone that wanted to make a profit out of nothing during my break from WoW.

Can't do anything about WoW accounts here, try contacting the WoW Account Admins.