I live in a rural area but there is a senior center, they have a couple paid staff and numerous volunteers.
Since practically everything is paid on line nowadays they will help a person get those things set up or sit and help someone write out checks for bills. They also keep a pretty busy schedule of things to get together and do.. watching old movies, art projects, gentle exercise , lots of people to chat with, pizza parties etc the vast majority of people who try a setting like this enjoys it , breaks up the loneliness , does she have any friends to sorbs time with ?
I worked in elder care for years and honestly the best advice is to not argue or try to prove a point, you would do better to talk to a lightbulb.
Does she take medications? I’ll guess yes since practically everyone is on something, maybe she’s not taking them correctly ? That could cause confusion. Most drug plans cover getting pill packs where each day meds is in a throw away plastic packet, I know lots of young people using it because it’s simple.
There are also some medications that are not recommended if any signs of Alzheimer’s or other Dementia is present.
Maybe check her area and see if any places are around for her to maybe give it a whirl.
Maybe try to just have a chat with her, maybe a call to her out of the blue , talk about the weather or whatever, try to avoid anything that might upset her. If she does have Alzheimer’s most get “ Sun downers” late afternoon and evening is harder for them , more confusion or agitated. So maybe call in the morning??
It’s incredible hard to know a loved one isn’t doing well and dealing with possible dementia.
I hope you can find a way to help her and it not become hellish for you