Is there any grievance addressal committee for a flat owner

Hi, Iam living in Hyderabad from past 8.5 yrs. It's been 2.5yrs i owned a flat near gajularamaram Hyderabad. Since we are from andhra from the beginning of housewarming function there was domination of local people in my apartment. To form apartment committee lucky draw was taken and my husband was elected as president.. All the local residents formed a separate group.. Held many meetings and without information they elected new president. We live in fifth floor and the slab was damaged. When raised complaint they simply ignored to consider it and resolve together by collecting money.. (Complete 5th floor flat owners are from andhra) . Me and my neighbor together welded a gate for our common area.. This area completely belongs to me and my neighbor.. We both had no issues till date but the residents in other flats black mailing that they would lodge a complaint that we have illegally build gate. (I doubt if they want to sit in front of my door). When parking my car within my allocated space, new president of apartment warning us again to park the car entirely back near to wall. Whereas construction was going on and even after telling they are not listening. We are mentally upset and depressed the inconvenience local flat owners are causing to my family. Suggest how to come out of this situation.