Interview process was good. I got a call of selection and was asked to join on 6th February 2019. I was not available on that date because of a trip. So I requested the HR to reschedule my joining date. She said it would be on 20th of February. I also dropped a mail with my request and asked the HR to reply. I didn't get any response for that. She didn't pick my calls and on 19th Feb when I talked to her on call. She said that my joining would be in March and she would mail me the details. She also asked me to call on 22nd and she didn't answer to the call.I have got no response yet. I called her again on 26th and she said she would look into the matter and call me. She was not ready to understand my complete query and hung up unprofessionally. Very unprofessional and rude behaviour from the HR.