Microsoft Project Manager interview questions

I got a call from HR for round1 interview. I acknowledged the interview slot. After waiting for 30 mins , the interviewer called me and apologised for the delay. I had to push my other meetings for this 30 mins delay. For second round, I took half day leave as HR wanted Skype call . Nobody called me during that scheduled slot. I kept waiting on Skype for complete 1 hr and sent 2 emails to HR and multiple calls but no response from HR. Very much disappointed with this no show. I lost my half day and had to miss few important meetings. Please value candidate's time.