i have a very serious threat to me and my family from builder vasant rajaram belambe and his son subodh , sushil, shrikant

Location/place: latur,maharashtra

Name of company/service: builder vasant rajaram belambe,latur

dear sir , i had purchased a 2bhk apartment in 12 apartment building from builder vasant rajaram belambe , latur . at the time of purchase he has not informed me that he is going to retain one flat in which his son subodh vasant belambe is living since then. but problem is that he and his three son are behaving like they still own the building and started arrogancy. association was also not formed then i made a complaint which forced them to form association . due to that they became very angry with me and now vasant rajaram belambe and his son subodh,sushil,shrikant are giving me life threats . even i have registered complaint at shivajinagar police station one and half year back , police is doing nothing as they are bribing police and trying to harass me by police and local gundas.
sir please guide me what can i do ? weather i have right to live peacefully in a home which i brought by hard earned money. i desperately seeking your help as i have a very serious threat to me and my family from builder vasant rajaram belambe and his son subodh , sushil, shrikant, judiciary can take lie detector test or even narcoanalysis of mine and vasant, subodh, shrikant, sushil belambe in regards of my allegations.