Need advice on a loan for my situation?

My husband and I were involved in a lease to own situation. The other party backed out early and gave us a buy or lose. We were not ready and so, my mother in law helped us out. Her name is on the loan, but all the money (down payment) and the payments come from us. We really need to get this into our name. We don't have good credit and our down payment was taken when we purchased. We were told that we could get a "refinance" loan without having to purchase the house from the parents as we have been making the payments. I am not finding anyone who understands this thinking and I need help. We have an interest only adjustable rate first and regular fixed rate second but the rate is very high. I need to consolidate and take over both loans.