Need advice on dementia treatment.

For the past few years, my mother has been showing increasing signs of what we think is dementia - repeating herself, not following rules when we play games, not knowing what day it is or thinking Christmas is soon for the past 6 months, thinking her husband is her father, etc. She doesn't have problems with words or identifying objects; she does misplace things often. She often wants to go home, but she thinks she lives in an identical house to this one, and when she does something in one house, it magically happens in the other, such as buying a piece of furniture. She obsesses over things, worrying and worrying for hours. She thinks she works but she hasn't for decades. She hasn't been violent that I know, but she threatened her husband and demanded that he leave "her house", and he often stays at a hotel down the street. Several times while he was at the hotel, she's fallen and was not able to easily get up. Right now she's bruised on her nose, head, two black eyes, bruised arm and toes from falling again. She won't go to a Dr; she's had an MRI but has not been formally diagnosed; other tests are all normal. She won't take the medication they prescribed, since she says she doesn't need it. She doesn't cook or drive. She has left the house before and had police bring her back. I live out of state, so all I can do is call her every day and visit as much as possible, but it doesn't seem like enough. She won't have anyone come to the house to clean or help out. I have so many questions: Does this sound like dementia or something else? When should she be moved to a memory care place? And how do you do that if she won't go? I don't think you can force her. if she won't see a Dr, who can I go to for advice? Shouldn't someone be overseeing what's happening? Her GP says it's outside of her area. And her neurologist says she should take meds, which she won't do, so he said there's nothing he can do. Sorry for the long summary. Any advice is very appreciated!!