You can contact the Account Security Team.
1. Go to : http://www.apple.com/support/itunes/account/
2. Scroll down to "Account Security" part then click on "Get account support" link.
3. When the page loads, select "Password and Security Questions".
4. Click on "Forgotten Apple ID Security Questions" or "Lost or Forgotten Apple ID Password"
5. On the next screen, you can choose to call Apple Support now or have them call you later about your account.