Harrassment at old age home

My father,80 yr, survivor of lung cancer, move with much difficulty with walking stick ( had operation for neck femur fracture) and my mother 75 yr a patient of last stage of Dementia and perkinson disease, bed bound, can not talk properly and can not recognize us are recently shifted to an registered old age home run by a NGO ( a group of ladies - wives of officers of central Govt establishment). My parents are staying in two adjacent room and we have deposited security deposit and medical fund donation for two rooms. we have paid monthly subscription regularly for last 3 months. They admitted my parents knowing all medical history to the old age home. My mother's speech has been stopped in Dec when she was critically ill and was in ICU. she has survived miraculously and now she wants to express sometime and she produces some sound which is in high decibel. she is given all medicine including sedation to make her calm.One of the boarder has complained to the management about this noise and the management is verbally asking me to shift my mother to some other place. I asked for a written order and they have not given after 10 ds. Now Kolkata is hot and I decided to install AC in their room but again through the resident manager management has asked me not to install AC and they also inform that they will shift my mother to some other room if I dont shift from here. As my mother is a patient of memory loss, shifting from her place which she is already acquainted and changing her attendant will have deleterious effect on her disease process. Moreover my father stays adjacent to her and could look after her when she is agitated. both of them are couple for 55 yr and somehow my mother recognizes his voice and touch. my question is 1)whether the old age home management can change her room on their own without our consent and specially my father's consent? 2)if they serve us notice to shift her to another establishment or another room, what will be our course of action? 3) What action we can take against this harassment of regular threatening by the management( the group of ladies) to the super old citizen (80 yr) and speechless, memory less, almost half dead senior lady. what is their right of dignified fearless living.