AppDynamics interview questions

I applied for a marketing role at AppDynamics and within a few weeks of submitting my CV, I received an email from an HR person inviting me to 2 calls: an interview and a general information call to learn about the company. We scheduled a call with the hiring manager for the position. I waited for the call with the hiring manager and he/she never called. After waiting for 15 minutes, I emailed the HR person. She responded several hours later that the call needed to be rescheduled. My call with the HR person continued as planned and she debriefed me on the company and provided me information about what AppDyanmics does. On the same call with the HR person, I rescheduled my call with the Hiring Manager. On the day of the rescheduled call with the Hiring Manager, I received an email from the HR person asking to reschedule the call again. I responded to the email saying that was fine and let her know about my availability. After a week of having received no response, I followed up once more. The next day I received an email from the HR person saying the position was no longer available. Felt the entire process was very unprofessional and incredibly disrespectful of my time.