PitchBook BDE - Business Development Executive interview questions

I was approached by an internal recruiter for the role above. We agreed day and time to have an initial interview with a more senior member fo their HR team. 8 minutes before the call she reached out saying that due to unforeseen circumstances her colleague couldn't take the call and asking if we could postpone to 1 hour later (5:30pm) same day. I agreed. I didn't receive any call or messages from either of them. Shockingly unprofessional, especially when you think that they headhunted me.