disconnection of backup power by association

My situation - I live in south Bengaluru in an apartment which is managed by owner’s association but it is not registered. Recently they started charging fine for parking in association owned parking slots. Although I know that slot was not allotted as there are few flats are still unsold. Parking slot allotted to me is uncovered as opposed to covered because I was not present during allotment. Since i can’t park my car there I started parking in an nearby available slot. Since that slot was not sold, association decided to take it under their control. I explained them the situation and asked for a month to put a shed for my parking slot but they refused and disconnected DG supply. My questions - 1. Is it legal to disconnect DG supply? What legal options I have against the association? 2. What options I have against the builder who allocated me uncovered parking even after purchasing a covered car parking? 4. During the power cuts, my family is sleeping in utter discomfort,