I had an appointment for a phone interview, confirmed by email with HR. I set aside time from my work schedule to be available. No one ever called. I checked my email to confirm phone # and date/time were correct. I emailed HR to ask what happened, no reply. This is highly unprofessional and rude behavior from HR, to stand someone up for a confirmed appointment, with no reply whatsoever. Even if they decided I wasn’t the right candidate, a courtesy to cancel would’ve been the very least they could’ve done.