can we file case on behalf of grand mother

Hum sb Delhi me rhte h..hmare dada g ki retired govt employee h.unki age 90+ hogi wo dadi g ka khrch bear nhi krte h or unke khane pine ka dhyan nhi rkhte h. Or is umr me bolte h ki unhe court me khrche k liye chakkar lgwayenege. Wo hmare chacha ki family ki sath bihar me rhte h. Abi dadi ki TByt bhut jada khrab thi to mere papa or Mummy unse milne gye the To wha k logo ne jabardasti krke dadi ko hmare pas bej diya. Wo chlne firne ki condition me nhi h or unka medical history v hmare pas nhi h or ab gaon walo ne shor mcha rkha h ki hm jabardasti dadi ko yha le aaye h or unhe kuch ho gya to wo bhut kuch krenge. Is case me hm kya kr skte h gaon me to unhe khane pine ko b nhi dete h or marpit v krte h jamin ki wjh se or yha dadi ko khud bejkr fir hmari glti de rhe h.is casecme hm kya kr skte h. Waise v wo log wha k gunde type h without license pistol use krte h or jameen k piche gaon jane pr sbko marne ki v dhamki dete h..wha ki sari property or unka hi kbza h.