central locking

I have a non-vtech prelude 94 and some bastard tried to thief my ride so now the key hole is fucked. It still locks by central lock but sometimes the passenger door jams until you play around with turning the key. I have to get out of the car and unlock it before any1 can get in! Other times it opens...Has anyone gotten thier central locking fixed that could give me an indication of costs to repair?