#1 - Nov. 1, 2010, 9:45 a.m.
I'd recommend calling Billing to get back into control of the account as step one.
You'll also want to make certain your system and email account are secure. They got your information to do this somehow - and if that means still exist, they WILL be back.
Billing and Account Services
Phone Support - 1 (800) 59-BLIZZ (1 (800) 592 5499)
Live Representatives Available 7 days a week, 7am to 8pm Pacific Time E-mail Support -
[email protected]
Players in Australia should call 1-800-041-378
Players in Singapore should call 800-2549-9273
Players in Chile should call 1230-020-5554
Players in Mexico should call 001-888-578-7628
Players in Argentina should call 0800-333-0778
All other international players should call: (949) 955-0283
Further contact information can be found here...
http://forums.worldofwarcraft.com/thread.html?topicId=24702231246 You may also want to look into getting an authenticator for your account. It's no substitute for good security habits, but it will help keep them out of your WoW account.
Blizzard Store
http://us.blizzard.com/store/browse.xml?f=c:6 Mobile Authenticator
http://us.blizzard.com/support/article.xml?locale=en_US&articleId=26109