I am in the final year of my bachelor and only need to pass one last course to complete my bachelor. The thing is I failed this course this year. Which means I have to continue for a whole other year just to follow one course which is only given in the last quarter of the year. Since I really would like to start the follow up master after the summer, I applied for an extra resit exam. This has to be done via an exam commitee not via the professor themself.
One of the requirments for this extra resit exam is you participating in all the exam possibilities which were two for this course (just the final exam and then a resit). I however did only participate in the resit for which I had a reason. The exam commitee thought I had a good reason and therefore accepted my request for the extra resit.
Of course when they accept the extra request they then ask the professor to give me the extra resit but you have to arrange a date for this exam yourself with the professors. My course sort of has two professors, one main professor and a sort of "side" professor who gives a smaller part of the course. As the exam committee instructed I contacted the two professors explaining the situation and that the exam committee gave me this resit asking them when it would fit their schedules and apologizing for the extra work load this resit would bring.
The "side" professor responded with that the decision of course has to wait till the main professor gets back (he is out of office for now) but that he is unhappy with this decision and thinks I did not have a good reason for not participating in the first exam and therefore thinks I don't have a strong case at all. Mentioning I expect them to do all this extra work with important deadlines coming up for them.
Now my question is how do I respond to that. I really understand this situation sucks for them and I really don't want to anger him further. So I was hoping to get some advice how to respond to this.