Why isn't my track pad working correctly?

After I dropped my laptop I sent it in to the insurance provider to get fixed and when it came back the trackpad, which they replaced, wasn't and still isn't working correctly. Specifically the right and left bottom parts of the track pad where the right and left mouse buttons are. They don't click anymore and when they do sometimes there's a crunching noise after I click down on the right one and it gets stuck and begins highlighting everything in blue. Plus I can sort of see through the track pad and the case into the inner workings slightly in a thin crevice at the top of the track pad that I'm sure isn't supposed to be there. What do I do? My computer is an HP Pavilion x360 14-cd1042nr.