This Apple ID has been locked for security reasons. Visit iForgot to reset your account (https://iforgot.apple.com).

Well if you tried, then do it through AST.

Check the AppleCare number for your country here:

http://support.apple.com/kb/HE57

Call them up, and let them know you would like to be transferred to the Account Security Team.

Then you're basicaly SoL.

One thing you can try, contact iTS, and they can see if it's going to a different rescue address.

iTunes Store Support

http://www.apple.com/emea/support/itunes/contact.html