HR called me through online portal and explained me the whole process. There were 4 rounds of interview. First two rounds were really good. Third round rescheduled for multiple times(approximately 2-3 times). Fourth round was also rescheduled for multiple times but somehow I managed to give that as well. All the rounds were really went well for me. I was hoping a positive feedback but got a feedback that my individual round's response was positive but overall feedback is negative. Not sure what kind of equation they have created by saying this. Interviewer's doesn't know how to speak with candidate, also they don't listen you completely while you giving them answers. Totally waste of time.