Firstly, sorry dude, but a screw and a bolt are 2 different things. You mean a bolt not a screw.
Secondly, The left and the right are exactly the same. You only bought half the bushings.
Thirdly, how did you hammer the hell out of the bolt with it still on the car and why? You'll need good tools or at least a rattle gun to get it off if it's not moving. You have got a wrench on the nut and the bolt right??