Preemption Law In Case Of POND

One POND measuring 35 satak approx - initially 5 equal shareowners (all resident of Jharkhand state), POND located at our Village (under Asansol sub-division, WB), POND was looked after by my father for the last 30 years, Father wanted to purchase the POND from all the five owners, After long pursue, purchased 20% from one owner in 2009, in self name, another 40% from other two owner in 2019, in my brother's name, but the other two owners betrayed my father and sold their 40% share to another person (our long-time enemy) one month back, without intimating us, Is there any scope/way/law through which we can regain the sold 40% share. Does Preemption law apply in this case? How much is the chance to win/regain the share?