Status of Father

Hi. My father and my mother don't have a great marriage. But my father never wanted to divorced my mother but created such situations so that she ask for Divorce. When I was in class 8th situations worsened and my father ran away from house in order to teach us a lesson. After that he sent a notice to my 2 Mamas, my mother and my Nana ji that they all have been harassing him(which was not the case). My brother wrote a letter to President of India and our matter was solved through a Raajinama by Local Police of Haryana. At that time my brother was 17 and i was 15. Now my father has again left the house. We are 3 siblings . I am 24 and my brother is elder 26 years and we have a younger sister of 18 years. My mother has health issues. she is diabetic, have retinopathy and just had a gall bladder removal surgery. Our father was having a conflict with us presently beacuse we have given shelter to our Mama ji who is now paralysed and have no where to go. my father wanted him gone. although all my mama ji's medicine and food expenses are borne by me and my brother. My father dont't like him much. Now the point is if he wants to leave us, he should do it for once and all. but he has made our life a hell by keep disturbing our daily life. By mentally affecting my ail mother. My sister is still studying. I and my brother have a Job. We have a whole new expense level. My mother's expensive medications and my sister's education. Please advise is there any way to get out of this situation.