Quest Diagnostics interview questions

I was extremely dissatisfied with the interview process. I got to the 3rd round - first, had a phone interview with the internal recruiter, then with a hiring manager and finally with a manager of another department. After 3 rounds I was expecting to get any type of notification about the next steps, at least the automated rejecting email. I reached out to their internal recruiter, who coordinated all of my past interviews, to inquire about the status of my application and got completely ignored. I found this EXTREMELY unprofessional and rude. I will never apply to this company again.