revoking release deed as i feel cheated by my mother and sister

My father died intestate in 1997 leaving my mother and 6 children including myself.in2000 we had a partition deed and I had 1/7 share of 40000sqfeet of prime property with 50square house. My mother and one of my sister were staying in the house.in 2007 with my mothers pressure I released my share to the last sister without any consideration. Now I came to know they have demolished the house and building commercial building. My mother and sisters are not talking to me after raleasedeed. Now I feel cheated and want to reclaim my share. My sister is adopted by my uncle. what can i do now?