Divorce

My mother is a fourth stage cancer patient , my father left us 8 years back. 2 years back he filed a divorce case on my mother in kanpur because he wants us to struggle. My mother is in delhi getting herself treated since last 3 years due to which she was unable to come in the case hearing except for first 2 or 3 proceedings. But now we suddenly came to know that the case is going through x party proceedings in the favour of my father which has shocked me and my mother. My mothers lawyer didn't informed any of this to us ever. So now we are in a big trouble as my mothers costly treatment is based on the medical card which was provided by air force because my father was in air force earlier. If the divorce is granted she will not get any benifit in her medical treatment in future. Please somebody help us please.