A land mafia trying to threaten our life and police station not firing any complaint against him

My father has a piece of land in a village known Awhalwadi and which has nothing to do with any civil matter. but the land mafia- sunil tukaram awhale is trying to grab our land by threatening us. he beat our watchman badly for 4 times. he also has one chapter case going on. he stole all our crop produce and whenever we try to construct any shed, he tries to break all of it at midnight. The sad part is that police is not taking any action against this. we have tried to make 14-15 complaints till now, and the police has not responded to any of them. We also tried to approach Pune Gramin SP, additional SP and no one has taken any legal action. The PI at the police station is showing that this land has civil matter but there is no civil matter related to that land. on the other hand, he filed a false case against us for the other piece of land and trying to show photos of that land on which police station PI is believing. we have all the legal documents with us and he has not shown to the court for 1 and half year. The question is why the police department is not firing any compliant against crime as he has stolen our equipments, crop produce and he has beat our watchman so bad that he was admitted to the sasoon hospital for few days.