Reselling of purchased land by same broker to other one

A relative of mine is a property dealer. he sold me a property which was not registered but he told me that I can make building over that place. But somehow I was unable to manage money at that time to build premises. So I was keep on asking him to get the property registered first then I will build my house over there. Finally after 2 years he said that this land wont get registered , so you should see next property at the same rate. I agreed on this and get a view of new site I didn't like that but all my money was at his hands . He told me that he will get it registered someday and he did so nearly after an year. When I started building over there another party came there and said that we have purchased this property 2 months ago and all of the work was interrupted. I called him again and he said that land is disputed I will show you another piece of land but at that time as I said him you just return my money I don't need any plot from you as you are moving me from one place to another place and not getting a piece of land from 5 years. Now he is not giving any money nor any piece of land. I possess the fard and registeration copy in my name So what can I do in this regard? Kindly help