TrueNode UX Design intern interview questions

The interview was friendly. The interviewer seemed super knowledgeable about design. Post first interview, an email was sent stating that you had 48 hours from the time the email was sent to complete the given design challenge. No consideration of the candidates own schedule. The design challenge was completed in time. I've received a rejection message (which is fine) but was not able to reply, since as of the moment you are rejected you are looked out of their hiring tool, where most communication took place. There was no way to a) thank the interviewer for their time and consideration and b) ask for any type of feedback to actually learn and improve. This is not the way to treat eager candidates, that take on the time and stress of interviewing and going through a design challenge.