Cheating in land sale

Hi, I have purchased a piece of agriculture land in 2013 and after 3 years when I visited it casually I came to know that part of it (almost 80%) is already acquired by Irrigation dept in 2008. I did get any such details when we pulled-up EC but when I visited said dept, they confirmed that they have already paid and purchased said part of land in 2008. Now the person (Mr. Nivas) who actually took money from me (actual seller) has purchased that land in 2005 from others but did not registered on his name and made that registration directly to from Pattedar (Raja, registered land owner). When I went to question this cheating, he is asking to file case against Pattedar (Raja) since they registered land on my name. But they did not take money from me. Mr. Nivas took money from me directly into his bank account. Further these guys are also threatening me of filing wrong cases against me like bringing Rowdies, paying low registration charges than actual transaction amount etc. Now how to fight these guys and what sections would help me here ? I want to put them behind bars with direct arrest warrant. Please suggest me a way here. Thanks, Shyama