Unfairly disqualified from my learners test

I was writing me Learner's test this morning and the invigilator disqualified me and took my ID. When I asked why he told me that he runs the classroom and he can do whatever he wants to. I told him that I would report him and he told me that I am younger than him and I shouldn't disrespect him. He humiliated me in front of everyone and watched as they all attacked me. I still don't know why I was disqualified as he didn't tell me and I would like my script to be marked if there is no valid reason.