Progress Speech & Language Center interview questions

The HR is not respectful of applicant's time. I gave him an availability for an interview so he can virtually interview me per his request but he missed both appointments and reached back a few days after apologizing and asking for another time to schedule! First off this came across very unprofessional to me and after reading the costumer reviews and seeing the low rate, I decided not to continue the interview process with this place thinking perhaps the founder and the supervisor are the same too!