The recruiter was running very late for a scheduled interview for a relevant role that I was qualified for without a heads up. When I emailed him after waiting 10 minutes to ask if we were still on, it was only then that he told me he would indeed be calling in a few minutes. When he finally called 40 minutes later, I received no apology or explanation and meanwhile, I had been scheduling my work meetings for the day around this one individual. I also did not hear back from him.