Memory care wants mom out. What options do I have?

Memory care unit has failed to provide care for my 99 year old mother who recently has refused care, become agitated during 3rd shift. My mother was prescribed Serequel recently in an effort to alleviate her anxiety, but it was only prescribed PRN and not OD to provide any kind of results. As soon as I wrote up an incident report of my mother's unclean condition (pull up soaked, feces caked in pubic area and labia) the unit nurse and head nurse took immediate offense and turned to the defensive position of "we can no longer provide the care your mother needs". This information was presented to me in an interview with the director and the head nurse. Nothing in writing. I requested an interview with the in-house nurse practitioner who prescribed the serequel and I am prepared to request further monitoring of my mother's behavior and appropriate modification or additions to her meds. That being said, I believe I have 30 days from a formal, written request to remove my mother from the unit(?) Should I wait for the written document then request an appeal to buy time while planning the transition to memory care in a skilled unit?