Cheating case of IPC 420

Hi all, I need a suggestion regarding a issue which happened to me. I gave my taxi vehicle to a person on monthly rental basis. He convinced me that he need more cars and want to invest money and he shall buy more cars on my name. On just verbal communication I gave him my car and Rs 10000 cash advance to buy another car. I told him to write him in bond paper on the same. He simply singned in a blank white paper with a sticking a stamp on it and told to write the matter by myself. I didn't write anything on it and just kept the signed paper with me. Since the moment I gave him money he started giving reasons and excuses that he is busy or sick. I forced him to surrender my car. He gave me my car after few days in a bad condition. But he is holding my money and still giving reasons. What should I do to get my money back? Need expert advise please.