Just to chip in briefly (thanks for the tag
@Admit-One ) - I suspect this is an issue because it is your 3rd year. My own dept does not allow, unless there are some vanishingly unlikely, super-specific reasons, 3rd year resits or supplements.
This is not that unusual - lots of places will not allow a second pop at third year. What would usually happen instead is that where mitigation has been accepted and applied for certain units in that final year (has it..?), measures would be taken to lessen the impact of affected units upon your average and so classification.
For example, my students would not be allowed to retake 2x 3rd year exams either. But if they had mitigation, and it was accepted, the exam board might remove the two exams from the average calculation so that they did not negatively impact the final degree classification.
Of course, the upshot is that there is no opportunity to
positively impact it, either.
Have you had mitigation accepted for the two exams in question?
If not, why not?
If so, how has mitigation been applied?