I had a similar experience when I was interviewing for a company and got down with fever and intense coughing, with the HR guy saying "so you cannot attend the interview". Sure, lemme just drive by your company in a woozy state and answer every technical question while getting interrupted by a tingling sensation in my right lung that causes coughing every 10-15 seconds like a germ machine gun.

After explaining to them my situation (which was audibly bad even through phone) I asked them to postpone for next week. They hired someone else. Turns out there is such a thing as uncaring people who just see you as a cog that facilitates their money-printing company. It is what it is.