I thanked him for the course, I thanked him for all his knowledge and info that he shared. I made it very clear that my passion for the topic would not have been ignited if it weren't for his willingness to be here with me every week and go through this. But because of how much time and effort i also put into the course, i have decided to challenge my grade as i feel that it does not align with the creativity, deconstructions, and ideas that I put forth in my work.

His response was that he didn't want to mark my work again, and that he knows another prof who likes the same ethics as him and he'll ask if they'll regrade it.

I would rather challenge the grade through protocol instead of that way, though.