Land acqition

Hi , our land acquired in 1987 , but govt never give conapnsation nor take possession on land. Govt decalared award and then sleep . In 2015 becasue of section 24 of land acquition act, Delhi high court declared acquition has been lapsed. But in the mean time, some part of land has been encroached by mean of buit house in unauthorised colony. Govt is not interested on reacquired the land. My question is Who is responsible for encroachment. We try to stop encroached overtime by mean of police complaint and personal attention but can't be able to stop encroachment on our land. As half the part of our land is encroached. Is not it govt and concern govt department duty and responsibility to safe the land after acquition. So now they free our land but it's not same as they acquired 30 years before. They must return it in same position where they acquired. What options I have left in this situation Shall I file case against 100,s of illegally occupied house on my land or demand my vacant land from govt.