First of all, whenever you go to a store to buy a piece of technology that costs any more than $150 - $200, ALWAYS purchase the store's in-house extended warantee. It helps avoid problems like this in the future. Most retailers will only have a return policy of anywhere from 14 to 30 days, after which, if it breaks, you're fuxx0r3d. It's just plain foolish not to get that extended warantee.
What ahajv4life said was true: Retailers do NOT repair digital cameras in-house. They do, however, ship out and recieve damaged, repaired, or replaced units free of charge (provided you bought the extended warantee, how many times need I mention it). It usually takes up to two weeks, but often you get the unit back in about 5-7 days.
If you've had it as long as you say (upwards of a couple of months), I can pretty much guarantee that the store you bought it from will do absolutely nothing to help you without charging you money for it. Given the nature of the breakage (lens), it might be more worthwhile to get a whole new camera. And...
BUY THE WARANTEE. n00bz.