Megane convertable 2005

Hi guys I wonder if I could pick someone's brains, I have a megane coupe convertable, basicly all was fine but now my boot won't lock when I close boot down, ive inspected and lock does look warn, my question is, how do you remove it? I can see 2 bolts close and I have taken them out but lock still does not move, there seems to be like a plastic trim over it all but no signs of how to remove it lalmost seems like it's glued, I'm eiger to sort this as the car things boot is always open and can not lock car. Cheers