Nextech Systems Software Technical Support interview questions

Applied for the position 5/17/18 Contacted by recruiter 5/21/18 via email for a phone interview 5/23/18 and I completed the screening process which was a personality and critical thinking skills. Waited for a phone call 5/23/18 after a 10 hour shift and was not going to sleep until she called. She didn't call. 5/23/18 She emailed stating she was not by a computer and could not call me. 5/30/18 She asked for another couple of days and times I would be available. I told her the next 2 days anytime. She didn't respond. 5/31/18 - No Call 6/1/18 - No Call I don't know what company does this to potential employees. I wasted so much time waiting for a call. This is very unprofessional and I wonder if NexTech knows this is how their recruiters represent them.