2012altima

Ok, so I was trying to update my pioneer avic x850bt and i couldnt figure it out....so I stupidly did a factory reset. This resets the password to whom originally had it before I got the car. I bought from a dealership and they dont have this on record. What am I supposed to do??? I am not paying pioneer $80 and having to rip this thing out of my car and reinstall it. grrrrrrrrrr so mad