if you can't get the bonnet open you'll need to unscrew the latch while it's shut. To do this grab a long flathead screwdriver and get underneath your front bumper. You should be able to look up to where the spring/catch comes down through the body (the circular hole with the wire latch in it). The end of the catch has a flathead grove in it, just unscrew it a couple of turns and try to open the bonnet as normal, if it still doesn't work you may need to completely unscrew it to get the bonnet open.