Someone linked their facebook account to my alternate email?!?!?

[Lemon Twirl Girl]

I have an alternate email that I use when I order stuff online, and stuff like that. I don't check it that often. I logged in today to find that someone had somehow created a facebook account using this email....I have no clue who this person is, or how they created this account. I have never had a facebook account, so I know there isn't some sort of "mix up".
I changed my email password and tried to change the facebook password to that account so I could just go in and disable the account...but now it says that the account has been locked, or restricted....I would like to know how I can un-link this facebook account from my email. Does anybody have any ideas? Or contact info so I can get some help from the people at facebook, to report this?!?!
Thanks for any help!