Land compensation paid to a wrong person

Hi, We have a land 26 KM from Patna. Four lane over bridge crossed my land and cumpulsation paid to person who has nothing to do with land. Land was purchased by father of my Grandfather. And then my grandfather was single in brother. My father who is also single brother and me too. My father also sold a part of land 20 years back. We have all the documents. We have also a report made by Government Official regarding our land and Vansabali. We have upto date land receipt and my father name in register 2. We have filed a writ in Patna High court 2 years back almost and waiting the case to be open. We had sent a notice to cumpulsation receiver earlier and they replied that father of my grandfather had no children. Kindly guide me what to do.