Some people just really do not understand that forms dementia or Alzheimer’s can take, and how it can result in terrible upset, terror, anger, and even physically lashing out. Even social workers can at times not completely be understanding of this.
I know this because I lived with and was full time carer to my MIL who had Alzheimer’s. My MIL hated strangers or unfamiliar people in her house, on a good day she may have tolerated them for a few minutes, but you’ve just no idea what will be a good day and what will be a bad one and this can change moment to moment. Also these people waltz in to do their checkbox exercise and then get to leave, and your then left there dealing with all the upheaval and upset their visit has caused.
I understand how difficult this is to deal with, but it sounds like this women underhandedly did this in order to do some sort of welfare check on your mum. Do you have social workers for you/your mum? When caring for my MIL we had two social workers, one for my MIL to make sure her needs were met, and one for me to make sure I was coping. It was my understanding that if there were any concerns, it would be our social workers who would arrange a welfare check, but perhaps I’m wrong. In any case if you do have a social worker I would contact them and explain the situation and what’s happened. If you don’t have a social worker you can contact your community mental health team, which I advise that you do so they can assess the situation. As your mums carer you see how she reacts and responds to different situations, so you are the best person to advocate for her needs, and if you think it’s in her best interests to stay in her current home, in familiar surroundings they you can push to try and make sure that’s what happens.
Do you have any power of attorney (POA) in place for health and welfare? I’m assuming not for finances as you’ve said your her appointee.
For lots of useful and helpful advice I would also take a look at the Dementia Talking Point forum.alzheimers.org.uk/