How to convince teachers to change my grade!? i need help from lawyers, future attorneys, and people who like?

ok so i took an online final exam and the internet messed up and ended up deleting 5 out of 60 of my answers so i got those answers wrong on the final exam. the teachers acknowledge the fault of the computer, but i am worried that they will simply take the grade out of 55 questions (omit the 5 missed ones) and give me a new grade. however, i still did poorly on the test and i want to retake it, so how can i convince them to let me take a new test? it just isnt fair if they do that because i know that i got those 5 questions right. if they count all 5 of those questions right that will be fair to me, but i want to convince them to let me retake it. how can i convince them to let me retake the test!????