Matrimony fraud

Hi sir,i have cheated by a guy by putting the profile in matrimony site.when he was in relation with me went to room with married girl,and kept the marriage proposal.later on his parents asked for dowry.we can't provide that much amount.he is prolonging the things since one year and telling to wait for the marriage And saying that when I get interest that time I would like to marry you like that.thing is that parents would agree right for wait proposal