What can I do if my 88-year-old mother fired the caregiving agency?

My 88 year old mother, a dear person, who used to be very sweet, has become very cranky and crabby. She has dementia. She has been living at home with a little help from an agency. Today we got a letter from the agency that they are dropping her because of her attitude. This is a very small town with no other agencies. The assisted living centers won't take her bc of dementia. Sibs won't put her in the NH and they won't take her in and I can't bc I am disabled and my husband has dementia. She definitely can't stay alone. We might have found a lady who would come in 7 days a week for an hour or two. But Mother fights with and yells at everybody who comes in, including me and the sibs and all her former friends. A really great mother. Sibs are uncooperative on the NH issue. What would you suggest we/they do with her, it is an emergency.