My lens stopped working, how do I fix it?

i have a canon SX160 IS

its taken small bumps from time to time with no issue, i really do try to take care of it but it isnt easy when your jerk dogs do what they can to get to what they want to bump it.

it took a small drop today, but seemed fine, i turned it on a few hours later, fine, i even took a nice picture.

after left alone on a shelf (where my dogs cant get it) i picked it up an hour later to take another picture, the problem? the lens opened about halfway then stopped.

lens error.

i turned it on again, it opened to 8X zoom then another lens error.

now it just sits like that, the lens wont move but sounds like its trying.

the lens appears not to be just a little stuck, its COMPLETELY stuck.

i cant move it whatsoever and im actually thinking of opening it to take a look.

any help?