I would suggest for you to get in touch the Account Security Team so they can verify your account and reset the security questions for you.
To contact an Account Security Advisor, see this article:
Contacting Apple for support and service
http://support.apple.com/kb/HE57
Or you can schedule a call on your most convenient time at this link:
https://expresslane.apple.com/GetproductgroupList.do?