The party that claims ownership of land is to establish that her/she is owner and show valid documents of ownership.
Maintain irrefutable written record of everything including measurements by revenue officials.
You may also obtain mutation records with link docs.
Verbal discussions are difficult to establish.
One may generate and maintain irrefutable evidences (audio/visual/witnessed/minuted) of threats etc..
Approach in person alongwith elders of the family, competent and experienced well wishers, seasoned PIP, your community leaders , a very able senior LOCAL counsel of unshakable repute and integrity specializing in revenue/Civil/criminal matters and well versed with latest citations, LOCAL applicable rules/laws/ … and having successful track record…. and worth his/her salt…..and share inputs /show the documents/evidence for a considered opinion..
At each location three are some counsels that specialize in such matters and they are well known.
Check for such counsels at LOCAL O/o Tehsildar, civil courts, HC, SC……