Builder delayed construction,now new builder demands double money

At night 10 pm we were sleeping in our house, suddenly 5-10 person came and out of them 2-3 ppl started banging door and used foul languages, gave bad words to my mom,father, sisters and me, we opened inside door, safety door was locked, he started abusing me and asked me to come out so that he can beat up me,when we asked him that who is he our neighbour came and said he is his brother, I instantly called police, police came and asked who called up listened my matter then he heard my neighbour's brother and asked me to dressup and go to police station, my mom and dad didn't allow me and asked us to lock in ourself at home, When my mom and dad went police station, police didn't behave properly and was not writting our complaint after 2-3 hrs at 12-1 am in night they wrote NCR that too outside police station and mentioned that We were knowing assaulter and situation arise as we light up'ed diya in front of their door due to which only his brother banged door and threatened us. My whole family is in shock what to do sir ?? I m very ordinary person have 9-5 job my father is 56 yrs old heart patient .