I don't want to help my ex ever again in an emergency.
Why do you not want to help your ex? Tell me why.
I'm not really the kind of person who would help someone in need. I don't want to help her.
You should always be there for others. You shouldn't be so selfish. You should help your ex out when she needs you.
Why should I help her? She's an idiotic bitch and she was always such a b word to me.
Well if the emergency is a life or death danger you should try to help or at least call emergency services for her. But by now you should move on with your life and find someone new.