Yes I would pursue it, because this is not fair. Do you know who to contact about this? A department chair, dean? Do you have an advisor? Can the tech folks explain this to the teacher? This professor is being rigid and it really bothers me when teachers are so jaded that they don’t believe a student. Plus, you emailed it to her. It’s not like you skipped the question. If you have the money i would even hire an advocate. Whether this makes a difference in your academic career may be an important point to consider, but in light of the teacher’s behavior, my reaction is that grade is irrelevant and this is just plain unjust.