Qualcomm Testing Engineer interview questions

Someone from the H.R. contacted me with the position details and a couple of hours later the interviewer contacted me with a couple of time slot options for the phone interview. The phone interview went really well, and said it would take a week for some to contact me with the next step. I followed up after a week, but the H.R. was very unresponsive to my emails and about 10 after the initial phone interview said there is an on-site request. I haven't received any e-mail after the interaction with the H.R. rep and had to follow up with him/her and came to know that that there was no on-site request but there would be another phone interview by the team. I followed up with the HR after 5 days to ask if the position is still open to which I was said yes and said a person from the team would contact me to schedule the interview. A day after the second round of interview is scheduled, the team member calls up and says the position has been cancelled. I felt really disappointed about the whole process and the lack of coherency in the team and a very unresponsive HR who could not act as the bridge. I had to cancel a doctors appointment for the interview and they just simply called up and said they want to cancel the interview. It took me a couple of days to come back to my regular routing. I felt this was really unprofessional.