I really need an advice regarding land ownership since it doesn't have a title

I'd like to ask if we still have right with the land my grandfather tilled for a long time. My grandfather died several years ago, so as my father and his 2 siblings. We found out from MARO or DAR that my uncle(brother of my father) transferred the right of the land to him as soon as my grandfather died. Recently, I talked to the wife of my uncle. I asked her if she holds any proof like a letter stating that my grandfather transfers the right solely to my uncle or a letter stating that my father and their sister agreeing to him possessing the sole right to the land, but she doesn't have any. A few months ago, the land was sold and the wife of my uncle asserted that we do not have right with it. Do we still have a claim with the land?

you can go to the Register Of Deeds Office and mbe pay P200 and get Certified Copy Of DEED OF SALE,,, check the name,, Its ESTAFFA to sell land if You are Not The Owner of have SPA..