Iam extremely disappointed with the service

Iam extremely disappointed with the service. I’m about to write my exams, but some of my subjects have crashed due to changes in the initial timetable. I registered my subjects based on that original timetable. Now, I’m being told that because this is a national exam, I’ll have to wait until the next semester to write the affected subjects. I’ve requested that they be flexible and allow me to write all my papers at once, under strict security measures, but my request has not been considered. This situation is unfair and frustrating, especially since it was caused by changes outside of my control.