Cursor not moving properly

I have bought this mouse around 3 years ago. It worked perfectly well until I accidentally dropped it on a hardwood floor. Since then the cursor won't move well and would move and stop when I move it around. Before dropping it it would work well and I could move it around and it would not get stuck or glitch. Now it's so hard to use it that I started using my trackpad. When I shake it I hear something moving inside it. I need help! This thing cost $100, and I don't want to cause my mom a burden. Anyway, I can fix it myself or is it possible for a technician to fix it?