“Appealing for Fair Treatment in Academic Integrity Violation: Exam Proctoring Issues”

Please help me write an email addressing the issue of academic integrity. I was flagged for an exam because my forehead was cut off (and I was not completely within the frame). Please help me write an email to the dean discussing the unfairness of this and why if a sanction must be given, it should be because of noise, cheating detected through noises or constant viewing off to the side, or someone else in the background.