MongoDB Sr Data Analyst interview questions

Series of rounds. Your flow of thoughts, Communication skills, Conflict handling skills and most importantly your technical skills. Had total of 5 rounds and was confident in every round. They took close to 2 months for interview process. Claiming that they hire only select people.Cleared all 5-6 rounds .But in the end could not even received feedback from HR. I emailed twice to different HR in hiring dept. side but got no response as of today. Please don’t waste time of interviewer for 4-5 weeks.

They added me to the interview process but then went back saying I didn't have the experience required for the field. They also forgot about me and didn't give me a rejection update until I prompted them much later.