Land Dispute with neighbours

Dear Sir/Madam, My hometown is in Dharamshala, Himachal Pradesh. I have a home at a place called Dari. It has been 23 years that my family is living there. My mom, dad and grandmother are living in that home. All are a senior citizen and they are innocent and don't indulge in violence. The dispute with the neighbours have mentally and emotionally harassed my family in a big way. The dispute is with my neighbours who have unlawfully acquired the walking land (gali) to our home. The gali land is a common walking land given to all the neighbours by one of the local people. The issue here is that two of the neighbours have occupied the area and are not letting us commute from there, also we have no other option. There is no walking area for us. We went to the patwari and the police as well. But there is corruption involved. They have contacts in police and therefore nobody listened to us. O the other hand the patwari is also on their side, because they have offered money to them. They have an illegal document and have altered the original ones as one of the neighbour was in land settlement department. Can anyone help me in this matter, so that i can help my family?