My question involves a consumer law issue in the State of: Illinois/Indiana

I live in Indiana and bought an ATV in Illinois. I did something stupid, yet unknowingly. The title had a lien on it, not from my seller, but from a prev seller. Now I can't title it. I contacted the seller, who said he would get in touch w/the guy who sold it to him, and get the Release Form. Nothing. He does not even return calls. I contacted the Lienholder company who won't send me the Release form, and said they sent it to the prev owner. I mailed him, no luck. I sent a registered letter to my seller, giving him a deadline, which has passed. What next? ALL I need is the Release Form!! Do I need to sue him?