Register fathers property under daughters name

Dear sir, My wife lost her parents at a very young age and she has been living with her grand parents, my wife’s father had built a house long time back .After his death the documents of the property was handed over to my wife’s mothers elder brother( her uncle) who had been taking care of the house( including giving it for Rent), the property is still in my wife’s fathers name and still not changed to my wife’s name. Her parents death certificate, insurance and property documents are all with him, we got married couple of years ago and have been chasing him to give the documents to us and each and every time he says different stories (I’m at the bank or I’m busy now etc etc).last week we went to his home to ask about the property and he is arguing to us saying he will give the documents when he likes.please give us somnlegal advise to recover the documents from him, everyone in the family knows the property documents are with him and he also admitted it with him but doesn’t want to give.Electricity, water bill are paid on time also land tax. Please advise the options to get the property registered under my wife’s name, currently she only her birth certificate and all educational certificates. I’m available in +[deleted]