The sh.t heads may have damage the lock cylinder.  Try gently wiggling it
and see if that works.  Don't force anything or you may damage more than the
cylinder.  If you know anything about locksmithing may try a bump key.
Otherwise I'd suggest hiring a locksmith to either pick it or drill out the
cylinder enough to extract the pins.  Over the years I've come to the
conclusion that sometimes it's better to just let the shitheads steal the
car and take it to a chop shop in Mexico than to experience the hell of
fixing the stuff they've broken.