Mum not well and feeling powerless

Hello I’m new to the forum and I’m glad there is something like this to try.
My mum is very unwell atm and refuses any medication and therapy. She actually doesn’t believe she has a problem. She has suffered a great deal of trauma in her life and long story short she recently moved but is having all sorts of issues where she is living as she doesn’t feel rules and regulations include her. She has been increasingly aggressive and agitated as well as hostile to the point she wants nothing to do with my sister and I. She has created yet another situation where she lives that the people around her want her out and are afraid. Police, avo’s etc have been entertained and she is sadly embarking down the legal action which she can not afford to stop the village from doing certain things regardless that to her benefit.
She won’t answer her phone or reply to texts.
My sister and I are feeling quite powerless as to how to support her and help her.
We are both over 40 have families of our own and we don’t even know what her diagnosis is or who her dr is as she refuses to tell you anything like that.
Does anyone have any feedback