If you have contacted the windows live team already im sure that have told you these steps.
What you can do is go to accounts.live.com
selecet can't access account
selecet someone else is using my windows live id
selecet reset password
put in the current windows live id for your xbox live account
put in captcha
selecet customer support
enter a VALID email address.
Please fill out as much info as you can, if you don't know the info skip it.
they will send you an password reset link instantly (if you entered the info correctly and verified your email as a windows live id.), use that and update all security info on your account, you will call be able to sign in.
The windows live team can only help you if you provied the correct info. good luck :)
Did this solve your problem?
Sorry this didn't help.
Great! Thanks for marking this as the answer.
How satisfied are you with this reply?
Thanks for your feedback, it helps us improve the site.