RSA Security interview questions

I applied for the role online. A recruiter emailed me to set up a time for a phone interview, along with a list of questions to answer ahead of time. I reply with times to speak on the phone with the questions answered. The recruiter confirms a time for the phone interview. The time comes for the phone interview and I wait 20 minutes and never received the call. I found this so unprofessional and rude to waste my time like that. I didn't bother to follow up with the recruiter because this experience left a bad taste in my mouth about how RSA is run and would rather focus my time and effort elsewhere.