Cancellation of gift deed without consent

My mother has 6 children's , 4 younger brother, 1 sister and i am the the elder son. My mother on 2005 made a land gift deed to me entitled to me. As, a elder son i have fulfilled my responsibilities and that to has been mentioned in deed. And the deed also states that in future this deed cannot be cancelled even if the donor wills to cancel. And it has been signed by all my brothers and sister that they accept it too. Later in 2008 due to some quarrel between my brother and my wife while i was in abroad , they went and cancelled the gift deed and transferred it to my mothers name. and changed their names in property tax, water tax except EB. Its almost 9 years and they are still living in my house at top floor and even the electricity is paid by me for them as the electricity card has been registered under my name. And they filled the case that i have done fraud and i have not fulfilled my responsibilities, And my lawyers have still not shown any progress. The opposite party are always filling false petitions and its still in IA Pending. My mother is also under their custody and they are not letting me to meet her, i want to take my mother to my custody as she is in her old age she is in a terrible condition. i can facilitate my mother with much better amenities. Please provide me guidance. My question is? What can i do now to end this case as soon as possible? How to change the name of deed to mine? How to get my mother to my custody?