Can't cope any longer

Hello everyone,

I'm 75 yo, my daughter is 55 yo. She has schizophrenia. I feel like I'm about to have a nervous breakdown. She will not detach from me. Like a child at my breast. Once, when she regressed, she actually tried to attach herself.. Wants me to solve everything. Does not believe she has schizophrenia. I feel suffocated, overwhelmed. She never stops telephoning me. Constantly. I've had to block her. I don't want to, but I can't cope. When she is not wanting me to save her, she is abusive, blaming, guilt tripping. She phones any hour of the day or night. Says she hates me. She's medicated and under care of local mental health team. Still she harasses me. I feel like a battered 'housewife'. I'm going under, and I'm scared for my own mental health. I have a diagnosis PTSD from trauma when I was young. I can't cope any longer. Is there somewhere a person of my age can go to rest? I'm really not coping any longer.