Cognizant — Hr not responding

Address: CHENNAI

My name is manibarathi ([protected]@ymail.Com) I have received an interview call for a test analyst from CTS talent acquisition that my technical interview is scheduled for Sep 1. The person called me that I have only one round if I did nicely they will issue an offer like that.
I attended the interview nicely, the interviewer itself give feedback that I had strong domain knowledge and technical as well. She gives positive feedback. So I thought that I will get the offer. After 1 week i received a call from hr that i cleared the technical round successfully, you will have hr discussion for that i have submitted cis and my previous employee documents and all.
I submitted that same day itself still sep 25, 2021 i didn't receive any update regarding that. I called that hr and mailed a number of times, no response till now.
Please respond as soon as possible.

I have shared all my personal as well as company offer and payslip all to the hr person