Case of dawry

Sir I want a suggestion, Approx 6 months ago my brother marriage got fix, we went to meet girl in temple and in first meeting my parents fix the marriage. They asked my brother yes or no about girl and he said yes. But after meeting we come back home then my brother said to my mother that he is not happy with that relationship. My mother told to other family members ( father's elder brother who was the middle man between both families boys and girls family ) but they all ignore they think that boy will accept after some time. After one month my mother hint to girls father that boy is not happy with that relationship but he also ignore that. Everyone was thinking that boy will accept after some time. Time pass on and nobody think on boys situation. But after 4 months boy call and told to girls father that he is not happy with that relationship and he don't want to marry his girl. Girls father told to my father to answer why he is saying that, If he was not happy then why he said yes in temple so come and answer. My father went to village, but due to family pressure because my uncle ( father's elder brother ) he told that if you break marriage then also we will break relationship with you, due to family pressure my father said that we will do marriage in same family and I will make agree my son. And the same day both family fixed the marriage date. But after that within one month boy again started to saying that he will not marry. And now the girls family saying to my father that if your son was not understanding then why you fixed the marriage date now all our society has know that my girls marriage has been fixed but now you are ignoring to marriage then we will do case against you. So please sir tell me in that situation what we can do. We are very afraid because we belong to Bihar and there 498a is very strict. So what can we do. My point of view is that even in temple my brother said yes but at same day he also said no. My father's one mistake is that even this knowing that boy is not happy he fixed the marriage in the hope that he will make agree to boy. And all other people saying same thing. So please anybody tell me that what we can do in that situation when girls family saying to do case of dawry against our family.