The interview process was good. The interviewer made me comfortable before starting the interview and it was a good experience, even tho i didn't get the opportunity the process was smooth

First of all their HR was not even sure of their own process. My 1st round was an aptitude test which I cleared after that I was informed that 1st round of interview will be scheduled in 2 days but I didn't got any invite then I contacted the HR again then I was informed that I have to take a coding test. for which I was ready. But again I got a call that no coding round is there and they will schedule an interview directly. This time an 30 mins. interview was scheduled. Interviewer started directly with the questions without even a greeting or answering my greeting. After that my interview ran for around 50 mins. instead of 30 and the interviewer didn't even asked if I am ok and available for an extended interview. Before interview I just received a JD of 3 words even after asking for a detailed JD and the interviewer didn't read my resume too. On top of all this I was asked few question which I answered correctly but interviewer said that the answer is wrong, I cross verified those answer after interview. ex. I told him that we have function replaceAll() in JS which we can use but he said there is no such function. There are some other instances like this. After few days I got to know that I was not selected which is ok but I sent a email to the HR about my interview experience and I din't even get any acknowledgment of that email.