False case of dowry by girl side

Sir/Madam my parents looking for a girl for my marriage in Bharat Matrimony application. We received interest from kanpur based family which we accepted and her mother told us that girl was not manglik so we trusted her. With later discussion I found girl as good match so we family decided to do simple roka which held on May this year. But on next day of Roka we reached Pandit for checking out the dates for marriage than we came to know that she is Manglik and myself is non manglik. And marriage is not good for both of us. So we updated same info to girl family, but now they start shouting and harassing us by saying that we demanded dowry which they can't have because of which humne rishta Tod diya. Now we got a call from ssp office of Parivar Paramarsh Kendra that we need to be there and in past we already had a discussion in mediation centre which failed last time. Plz help us that do they can file FIR against us w.r.t dowry case which we not demanded and what can we do in this case.