On legal grounds, you can file a case against him. You can go to the court because there is nothing that you can do as he has the property now. Visit the near police station and ask them to help you to get back to the property. This is not easy to get your property as you have permitted your uncle to have it. So, legally this is now theirs, not yours. But, if you think that filing a case can help then you should do it for sure and carry all the proofs with you.