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It is probable that the mechanism has been so badly damaged that nothing you could do will improve the situation. This includes trying to 'bend it back' - unlikely to result in any improvement, and possibly leading to worse breakage - or trying to force the lens into the closed position.
But before trying to decide as to whether to replace it, or have it repaired, some things can be tried, and some questions should be asked:
Try removing the batteries, and leaving the camera on a (dry, non-humid, non-dusty) shelf for overnight. Then put the batteries back in and try the camera again.
Then try cleaning the terminals in the battery compartment, after removing the batteries, first by rubbing off with a fresh pencil eraser, then by wiping the terminals off with cotton swabs moistened in rubbing alcohol, then letting them dry off for 5+ minutes with the battery compartment door open, then try turning the camera On again.
How old is the camera? in months or years since you bought it.
Has the camera been operated in or subjected to, temperatures below 32 degrees F (freezing point) or above about 100 degrees F ?
Has it ever been subjected to a humidity higher than 85 % or gotten wet ?
Has the camera been operated in a gritty or sandy environment, such as a beach, a seaside, a construction site, or the like?