Discover interview questions

Contacted by a recruiter then had a phone interview. It took about a week to have an interview with Discover. The interview was scheduled at 9 am via conference call. However, no one was there on the line while I waited a bit. So I reached out to my recruiter to see what was going on. Then, about 2-3 hours later, I receive an email from recruiter that there was a technical issue. That was quite unprofessional because I could have at least learned that there was an issue within 30 minutes of the scheduled time instead of 2-3 hours later. What was so hard about letting me know first? Need more respect for candidate's time. Eventually I was able to have an interview with two people on the line (sounded like both interviewers were connected from different locations). The sound quality wasn't really great so it was hard to understand.