Uber India — lost earphones

I left my earphone in the cab on 27th november. The driver's name is rajkumar. Immediately i called the driver but he said he is not near my place. Thereafter i called him any times and he always said that he is not in gurgaon and he is not getting any trips to gurgaon. I even offered him to pay incentive if he comes here. Its more than a month now and i am not getting any response from him. Please help me to get me earphones back.