360 Controller Broken LB and RB bumper repair - Any tips?

Recently I dropped my controller on accident and the bumpers have now become non-functional. I have it opened, and all I noticed is that the lb button that the bumper presses on is straight, but still doesn't press, as I need to hit a certain spot on the LB to make it work. The RB one is having the same problem, but it won't work, period. The receiver button inside seems to be slightly tilted down to the right. Anyone had this problem, and if you have, what did you do to remedy it?

My rb button stopped working also. Later it wouldnt even turn on. So I have it in its coffin, my xbox 360 underwear tin.