Rights of father when daughter is abandoned by her husband

Shakshi married Gargesh (both names changed) in December 2000 according to Hindu Brahmin Community tradition. Gargesh moved to Sydney on deputation. Soon cracks developed in the relationship due to harassment resulting in Shakshi undergoing mental depression. However another son was born in march 2016 with the harassment. Finally Gargesh sent Shakshi to India telling that he will get the passport for the newly born child and then come to India. Shakshi was treated in India. Gargesh refused to answer phone calls or email. Parents took her to Sydney to provide moral support and help but Gargesh changed his residence and is not willing to talk to or see his wife or parents or to give the address where he is currently residing resulting in financial loss, mental agony and hardship to Shakshi and her parents. Under these circumstances whether the parents of Shakshi have any rights to seek legal remedy without affecting Gargesh and the children he is keeping with him.