FIS interview questions

Interview process was very confusing. I applied through LinkedIn and got call from hr I was invited for the slot of 9.30 I thought it is scheduled interview but it was walkin Huge number of candidates ware there and everyone was confused about the process First round was written test and got cleared. Second was technical interview, it was good and answered 80% of questions and cleared as well Third round was Management round and he asked me random question and answered all of them and he told me to wait for hr round. Hr then told me they will arrange final discussion round next week and when i was there for final discussion round they took technical round again and told me that "you're inexperience for the position " and interviewer was very unprofessional. They rejected me for no reason. Do not attend the interview because they are just wasting time