Zendesk Project Manager interview questions

Applied online, got a reply within five minutes asking me to self-schedule a phone call with the recruiter. Did just that. Day of the appointment comes. Nobody calls. I write back to the recruiter asking what happened and whether I should reschedule. No reply. I write to the guy on LinkedIn. No reply. My theory is that the email account has an automated CV screening tool attached and this person never really looked at my CV or saw the appointment. I’m seriously wondering if he exists at all. This was the most unprofessional recruiting experience I’ve had in my career.