Need suggestions on this case 420 cheating case filed against us

Hello, This is regarding our brother, We went to see proposal through marriage mediator of our community whom we found that our distant relative in end of last year. fixed mid January , we were asking to get wedding by early Feb. because I stay overseas , good time to come and visit. Girls side did not agree . Girls side have been very dominant from day 1, we have accepted and moved on . they wanted to get the engagement done , where my family side did not agree because I could not go, finally the girls mother spreaded the message that we want it , the dates are good and forced us, we agreed with forcibly. and then she asked for 50k saree for engagement which my mom said ,we dont want to buy such a expensive saree just for simple engagement. she( her mother) created so much mess around and we finally agreed. engagement done end of january, then my brother always met the girl at home very few times. she was always behind my brother . he was reluctant to meet. due to corona the marriage dates kept postponing since i can notvisit india, finally changed to December since i can go. but I could not visit, and told to go ahead with the arriage. the problems started again, where whatever they promised during the matchmaking , they did not agree. we accepted and moved on . december nearing ,in october the girls side said they comehome and talk about next arrangements and the girl said that her parents are to my home,my brother said to hertell yourparents to call my mom , she was careless, and finaly she said that ,"my father said , we have told himm already and what is the need of telling to his mother" , my brother felt bad and said they are disrespecting now itself , we dont want this marriage. we called marriage broker or mediator that they are oing this, from day 1 her mother wanted how she wanted, buying such an expesnive saree, not respcting us, it is an arranged marriage not love marriage, etc, they came home and said every thing willbe ok and we said for marriage we will buy the saree howmuch ever we wanted not what her mother ask for, they agreed. finally we were convinced. before buying saree , her mother called broker that she wanted more 1lakh saree , we did not agree initially , later broker convinced us. we bought them 1 lakh saree. we sent them food list , received no response. we send flower decoration received no response ( agreeing mutually ) , finally they came home around 20 people to home, scolded my mom , brother and our family very badly on the roads , inside home. they said they dont want this marriage, my mother went to shock state since then had to admit her in hospital. that girl started calling us ( me,my brother and cousin) , every day she speculating one reason , she loves him so much , had physical relationship ( messaged me, i responded my brother is not like that, your family came and called of by scolding why are you coming now) threatening us. finally we have a recordin of agreed but again filed a 420case