Regarding mutation of land and IPC 390

My mother named Sutapa Bose earlier had a society land whose area was 1600sq.ft.She sold it on 2012 to some X party at cost of 9 lakh.X party got that land registered but the mutation of that land was not done till 2019.So My mother consulted our family advocate and showed the xerox copy of the registry and khasra/khautauni to our family advocate.Our family advocate checked every documents from collectrate and confirmed my mother that as the mutation of the land had not been transfered to that X party soo as per legal documents it's urs....so he suggested us that we can resale it to Y party with present rate.So my mother sold it on FEB.2019 at the cost of 2000000 and this time the Y party got that land registered by her wife's name as well as the process of mutation was also converted replacing my mom.'s name to the Y party's wife. Now here at present the Y party's wife is the owner of our sold land.On 20th this month the Y party went in their land and started constructional work.....sooo now the twist comes here when the X party arrives on the spot demanding that it's their land.I suggested my Y party as the land not belongs to X party bcz as per mutation records there name doesn't exists...so i suggested my Y party that it's their land. On 22nd May both the parties visited our campus with around 4 scoripio car and 1 Breeza car with around 20 to 26 persons involving women also.I suggested them that we should approach to court and sort out our disputes. ..but all are in vain.They call the police and that too dial 100.Dial 100 police arrived and infront of them the beat my mom.very badly including me.At last with a dramatic scence the dial 100 police stopped them and took me some few yards and said me that ur surrounded by mob now and one way to stop the mob is that plzz pay us 12000 and we wil get the compromise done.I agreed to them as our life was in danger and said to the dial 100 personnels that we will pay 5000.Dial 100 agreed and suggested the Y party to siege our furniture, car,gold,two wheeler,electric appliances, electronic appliances each and every thing from our home kept me and my mom.in captivity for around 4 hrs.in their and forcely suggested us to present them 1900000 lakh cheques in advance with movable and immovable assets.Now me and my mother life is in danger so we r shifting to west bengal.I let u know that i am also a law student and these people finished my career as the semester is approaching on December. Plzzz guide me. Can a case of IPC 390 be filed against Y and X party?Can a case of violation of human rightsbe filed against both the parties?