Karrm Infrastructure — No possessions received neither received refund

I have took 3 flats from Karrm infra in 2013 and they promised to.give in 2017 it's 2021 and no update yet i have been mailing them but no rply i have also called there customer support but they never answer the call when visited there office it's closed me with more 300-400 people's have been cheated by this builder please help us we have invested alot of money in this project thinking that it will.be our dream home and now everything is ended for us.