Again, we are hearing only one side of the story. I have been around long enough to know that every story has two, sometimes three sides. People here are giving Emma advice on getting a lawyer, going to HR, etc. without knowing the entire situation. I worked for over 40 years and I've seen a lot of situations. I've been a supervisor and I've seen very good and very bad employees.
My "default" is to know both sides of the story before taking one side. If yours is not, that's fine, this is just a web forum, not an actual situation. An actual situation is far more complex than what has been presented here.