Old landlord refuses to give up property and refuses to give me his address

My mother and father was storing some of their personal belongings n my garage. Well we moved out and when we went bs k to get the stuff. The landlord changed locks n the garage... My mother has talked to him recently and he refused to give her his address. And was very rude and hungup on her. My sons toys and things are n this garage too that my parents bought them.. I've tried everything g to get this mans cooperation. Can u plz help me!!