Parking dispute in Apartment

I am resident of Hyderabad. I bought a flat from a local builder who developed a site of around 350 sq yards to build a apartment . Apartment has 5 floors and each floor has one triple bedroom flat. The two land owners has got 1.5 flat each as per the agreement between the local builder and the land owners. Our agreement with the builder was to construct the house with minimum specs agreed and provide one car parking and one two wheeler parking in 4th floor. The local builder got bankrupted during the construction and couldn’t complete the building till the end. The builder could complete only 80% of the building. The five flat owners who bought from the local builder contributed and completed the building all in good terms. When coming to the parking spaces allocation all the flat owners took a lottery to reserve the permanent car parking slot. One of the land owner who got the car parking slot in the lottery doesn’t follow as per lottery and is parking in such a way that we cannot take our car from our car parking. Please note none of the residents have any registered documents to prove that they have registered permanent car parking and car parking is nor marked with no boundaries. The two land owners(1st and 2nd floor) are now grouped together and are parking as per their convenience because of which we cannot take our car out. The land owners threaten us and humiliate us saying we have no right to ask any thing and ask us to approach builder to find the car parking. The two land owners have crossed the limits by marking all the car parking as per their convenience which leaves that we don’t have access to our car parking. The other two flat owners( 3rd and 5th floor) support the two land owners because of their previous friendship and caste groupism and doesn’t support us in justice as they don’t want to get into tussle and happy with their car parking’s which are not disputed. I spent all my savings in buying this flat so that my parents can have peaceful life during their retirement but my parents have to face all humiliation and threats because of the above problem. I stay outside India which leaves I cannot support them in daily tussle directly. We have registered case in police station and raised FIR for the harassments like they stopped elevator when we try to use and abused my parents in flitty language and one of the resident attacked my father with chappal ,we have also complained that our car parking is blocked. After raising FIR, harassments have increased further as they stopped elevator by intentionally burn out the parts of elevator controller(no evidence). When we asked to repair and ready to contribute from us, there is no response saying they have no funds. My parents( age 68 and 60 years) stay in 4th floor and have severe knee pains where as others are young enough and are climbing stairs daily. Please guide me so that I can make the elevator working and resolve my car parking