I am currently interviewing for a position. I was asked to either join a virtual interview room or call for an audio only experience. I joined the interview room ten minutes early and when my scheduled time came by, the interviewer did not join. I tried calling the phone line, thinking it could attract the interviewers' attention to no avail. At the 15 minute mark, I emailed the recruiter, and have gotten no reply. I'm currently at the 30 minute mark of my interview, and no one has shown. I am personally worried about what would be proper and/professional for me to do in this situation. I doubt that the interviewer would ditch my appointment for no reason, but I considered that maybe they had double-booked their time and that there was something I could do in terms of that. My next step is to try calling the recruiter, but I don't know what else I can do. Any advice?
Edit: 50 minutes in, I have confirmed that I had the time correct, and that the Hiring Manager confirmed my appointment.