Hey HiDef
Seems like your account does not exist. Do the following 4 steps.
Many of the issues associated with sign-up problems (not being able to login, not getting an activation email) can be solved by doing the following:
1) Clear your browser cache
2) Clear your browser cookies
3) Clear your internet history
4) Close and re-open your browser and try again
THEN try to sign up again like you never even made an account. I have no record of your account. You are using your gamertag as your login, correct?