Salesforce Software Engineer(Internship) interview questions

Recruiting coordinator and senior manager are very unorganized. I had my interview rescheduled about 3 times in one day which was alright because it was going to be about 3-5 days in advance. Then they told me my interview would be the very next day because the senior manager was going to be out of town. I could not make it because it was too last minute and I had exams to study for. The senior manager never showed up for the interview but she did give me a call but my phone had died about 15 mins before the interview (so that was my fault). Apparently, she wanted to call me and say she couldnt make it. I emailed the recruiting coordinator telling him what happened. After the no-show I received an email saying they were not going to go through with my candidacy. Then the recruiting coordinator tells me he will reschedule the interview. This whole experience was a mess and very unorganized. Why don't you guys hire someone that can actually show up to an interview instead of cancelling last minute? Waste of my time.