The only solution is to locate a repair shop and have them determine if there is anything that can be repaired. You don't say what manufacturer the lens is from so I cannot direct you to a shop or manufacturerer's site for repair information.

If the lens is not an expensive model, you may be better off replacing instead of repairing it. These lenses are complicated, rather delicate pieces of gear. There are many plastic parts inside and they really do not respond will to being dropped.

Sorry . . .