Lost Access to Fan Page admin/ FB doesn't send sms security code

Hi guys,
I have a FB account for the only propose of administrate a fan page, which is facebook.com/blogvia

What happens is that since last month Facebook keeps asking me to confirm who I am, and doesn't let me login to the account unless I type some security code sent to my phone number. The problem is that I never receibe those sms, so I'm unable to type such code...

I've tried in loopings: reset account, reset password, confirm information, and get stuck on the security code supposedly sent to my number. It never comes...

The main issue on that is that we have just customized the fun page, and created this username (/blogvia). If we otherwise start a new fan page, won't have the username anymore...

Do anyone here have a clue on what to do now?

Thank you very much.