[s]did you follow the link and do as they request? if you are legit, just explain your situation openly[/s]

oh, and you may want to get a blizzard authenticator (link ) to insure your accounts never get hacked

edit:
as suggested below, contacting blizzard directly is probably the best route. following the link might be an issue (looking at the link provided looked alright, but i have no idea what you received)