1. It is really unfortunate that your own uncle is cheating your father's hard earned money.
2. However do not loose possession of this house and stay in the same house.
3. In the meantime file a suit for declaration that your father under that circumstances built his on the name f his brother.
4. If you do not leave this house your uncle would loose the case to a large extent. Involve family elders to make your uncle understand about his cheating on his own brother.