Propper Daley interview questions

I had an interview scheduled with the Managing Director/ Social Impact Chief Operating Officer and got stood up for a full 30 minutes. To this day I still haven't received an email response apologizing for missing our appointment or asking to reschedule. I was initially really excited to interview at this company because of their social impact work, but being stood up for an interview with no communication on what's going on exposes the unprofessionalism of the company. This set a bad precedent of how chaotic it probably is to work for them and overall lack of respect for people/ employees.