How do you talk to someone like that? You don't. The minute you hear anger and abuse, you can tell her that unless she speaks to you with respect, you will not have a conversation. She will get angry and try to deny her behavior. Ignore it, and hang up. People get angry when you call them on their behavior and have good boundaries. She has problems and issues that you cannot help her with. She won't change unless she recognizes how toxic she is. You wouldn't allow someone to throw rocks at you, and that is what she is doing verbally.

She is behaving like a spoiled child. What do we do will children who have tantrums? We ignore that bad behavior. Take care of yourself. Don't allow her to abuse you and bully you.