Can I file defamation, libel and slander case against my supervisor?

I found my job at my school's website. I needed exposure in the industry for a program for college and I clearly stated that with them. My supervisor, who does not particularly like me, just gave me a bad review with plenty of inaccuracies in the report. She knows that I need the review for school. When I asked her why so many inaccuracies are there, she didn't have a good answer except that she kept saying that it's not personal. I do have emails and text messages of her praising me, but when it came down to the important paperwork that I needed, she didn't want to provide it. Her words (verbal) are glowing about me as a worker, but the paper states otherwise, even as far as saying I endangered a client, when in fact I did not. Is there anything I can do here? If I work with her more, I just screw myself further and potentially exclude me from the school program I am gunning for.