Ongoing case in court related to farm distribution

Case regarding dispute of farm land ( saras-miras vataptrasath) between my father and my cousin brother is ongoing. My father is 78 age, and stays with my mother at my native place, my cousin brothers around 55 old of age, their wife's & son (24 to 28 age), These people together always keep or threatening my father, they also threaten our farm caretaker on some or other reasons, they specifically demand to allow them to use my farther piece of land to their transport i. e. road. Partition of this farm was done long back almost 15 to 20 years back, between my father and late uncle verbally, since then my farther is cultivating the farm land which was allocated to him, have put in nots of efforts and money to develope this farm, now my cousin brothers are not in agreement with the farm partition, and want it to be repartition, which my father has denied, and hence they have loged civil case as mentioned above, and is in process from last couple of years. However my cousin brothers keep on threatening my parents and our farm caretaker regularly for their demand of road, they have adjacent road to their part of land which they were using all these years, however due to dispute between them and adjacent road owner, they have stoped using it and have start demanding road from our field. Couple of cross NC are already done for threatening. However things are not getting settled. What should be done, also incase they forcefully try to destroy or harm the crops in field keeping us unnoticed, how to face it, can we bring it to notice of court, or is their any provision to book them under some criminal or civil offense.