Gemini Consulting Software Developer interview questions

Interview for software developer(java script ,react.js ,node.js) I got email from the company to attend interview. as i was 9 months work experience in MERN stack. They conducted written test on javascript and apptitude.They called me after 1 month by saying that i have cleared 1 round they told me to attend 2 round.In 2 round it was system test on React.js,node.js to develop a sample application with API's.after 1 month of my second round they called me and said you got shortlisted.and to attend final round.They told this was the final HR round and requirement was huge and immediate joinees are preferred. I though it was HR round to my surprise. when i step into interview room in the company The interviewer. he also don't know that he need to take interview .later he come to know he need to take interview and asked some formality questions. on react and node.and told that i will have final HR round.and will be called shortly for HR round.still today no response from company.I still don't understand why these people conduct interviews and that too for 3 months long process. and wasted my valuable time such a irritating Hr people.At last my suggestion don't opt for this company unless you don't have any option in your hand.worst company worst experience.