I locked myself out with Bastille!?

Okay, so I was just starting to learn how to use Linux, specifically the security aspects of it, and I installed a program called Bastille. When it asked me what user accounts I wanted to allow I accidentally made it so that the only user account on there was not allowed. Now I can't change any files or anything on the computer, I can't even open up the internet (I am on a different computer now). I have tried logging in as root in the terminal, but it does not allow me to do that either. Is there something I am doing wrong or a way to fix this? If so, I would appreciate the help.