Failed PGCE...appeal?

so what happens if the school terminated the placement and writes such a daming report about you that the university even asks you to leave the course? They would not even look at my evidence. I have emails and feedback that shows I was a good trainee and that my mentor just did not like me. She made up lies and made it look like I was seducing year 10 students, that I was confrontational to students, eventhough students came to me to ask for help at home. Now one even wants to look at my evidence and I worked sooooo haaaaaaaard for this. What can I do?