Threatening about cutting water connection and power - (Bangalore)

I am the owner of a Flat in Bangalore, the building has around 24 flats in it and this is my problem with the association and require some legal advice. Our association has not been maintaining proper accounts and providing the service worth the money. They charge an exorbitant amount of money as maintenance, yet there is no proper security or housekeeping. In the meetings, I tell my concerns but there is a monopoly of a crook who does only what he wants. Most of us residents have to work to put food on the table and bother less about these things. I stopped paying my maintenance until there is a change, now they are sending mail that threating to cut power and water based on an old sale deed. They have not even once in 6 years got the accounts audited, when questioned about it they divert the matter saying you pay the money we will get it done. I want to know if they can threaten us about cutting our water supply and power. Also whether I can take any legal action against them for humiliating my mother.