How can I fix my Casio EX Z2? ?

My Casio EX Z2 fell while attatched to my tripod (tripod was only semi-open). When I inspected the camera i saw that the zoom lens had shifted entirely out of position. Prior to this, I also took it to the beach where it worked fine, when i tried to use it after that period, the zoom mechanism began making a harsh clicking sound as it stuck in position when I tried to power it off, when this happened I would usually give it a light touch and it would go in fine (think a grain or two of sand got in it while at the beach). The only other problem I have had with the camera was that on a few occasions, while trying to take photographs, if I ever zoom in or out to the max the screen visual of whatever I was photographing would become very blurry and eventually tell me that I have a lens error and to 'retry power-on". Beyond all of this all the other functions work fine and I haven't had the camera that long (about three months and a couple weeks). Help me please. Thanks.