My ex sent me this message, What do I do?

From what she has written, you have caused her alot of anguish and pain. Stop contacting her. She has made it clear she doesnt want to ever see you nor talk to you again. Dont call her anymore. If you care about her, you will just let her be happy. If being without you is what she wants, you shall let her be. She will talk to you when she is ready to talk again. Dont push it and bother her about it. That'll just drive her even more mad. Give her some time and space to work things out. You should too.