Digit IT Support Engineer interview questions

Interview scheduled Thursday 3:30 pm. Waited about 5 minutes but no call. I emailed the interviewer and asked if we were still having the phone interview. He replied saying he was unable to reach the mobile number I provided and had to reschedule for the next day in the afternoon. I always test my phone before an interview, but I didn't question him. The next day I tested my mobile number and made sure my phone was reachable and no issues. I waited for 15 minutes for him to call me again. With no call, I emailed him letting him know I was ready and if he was able to call my mobile number. No reply. Finally, 31 minutes after our agreed scheduled time, no call or email reply. I emailed him letting him know that I hoped everything was ok and to reschedule for the next week, which I didn't hear from him anymore. I totally understand emergencies happen. If he found someone else, at least reply to let the candidates know what is going on. I hope the company irons out the interview process.