Mentally harassment and life threatened warning by uncle to my mother

Sir I'm handicap person mere uncle(pawan ) ke sath jameen ki vand ka dispute tha..mere uncle ne apni baat manvaane ke liye mere mom Ko mere sahmne dhamki di (ke agar tum baat nahi manoge to kal ko mere dusre uncle (Raju)tumhare bete (Surinder ) ko nashe ki haalt mein jaan se maar skta hai tabh tum akeli keya kar logi vaise bhi tere ladke ki ek leg hai kahan woh hamse lad lega) ..aur iss dhamki ki audio recording bhi mere pass hai..dhamki ke baad issi din se mere mom mentally disturbed ho gaye and daily route rehte the ke kahi sach mein uncle mujhe Marwa na de dusre uncle se and issi treh day by day unki haalt najuk hoti chali gayi nd unka tension ki vjeh se bp badne lga nd fever start ho gaya unke blood platelets bahut kam ho gaye and end mein tension ke kaarn nd shugar badne ke kaarn uhne hospital mein admit karvaya and 15 din baad unki death ho gayi (dhamki ke baad 3 mahine mein) lekin doctors ne death cardiac arrest and covid19 btaya...to main abb keya kar skta hoon advise me please..kaunse law ke under main case file kar skta hoon and mere uncle ko kitne time ki punishment milegi jeyada se jeyada..