WeWork Machine Learning Engineer interview questions

Contacted by a recruiter and was asked for availability. I replied and she got back to me saying she is out of office that day and asked me to schedule a different time. I sent her another date, and she told me she is fully booked for that day. Then, I asked her what time works for her so that I can make sure I pick a day that works for both of us. Never heard from her since then. Politely reached out with a follow up email, but got no reply. Very unprofessional and irresponsible recruiter. My experience with this recruiter is the worst out of all the companies I have interacted with so far.