Help with registration for Infinity Challenge

I went to register my GT for the infinity challenge. I ran into a problem when trying to verify my account using my email. I tried to access my zune account where I found that my zune email had never been accessed. I turned to zune support and found that I should just change my xbl gt to be associated with another windows live I.D. So I did just that, I changed my GT to be associated with another email address. So, one bogus problem has been fixed. Immediately I realized that I still need to verify my registration via my email. So I tried to re register and ran into a problem. “The gamer tag has already been used to register.” So here I am. Still needing to verify my registration via email. Which seems to be impossible. Can someone please advise me further? In preference someone who has admin access with the ability to resend a verification email to the new windows live I.D.