Cognizant — Offer letter not released ,no response from HR

I Team,

I am Abhinaya M([protected]@gmail.com).I have attended technical interview for senior QA on 16th september and on the next day got confirmation mail saying that I got selected and to submit the CIS form to proceed further, then I have submitted the CIS form with required details and replied back.

Later on 29th september 2021, I got HR call and discussed about my package and designation, after that HR confirmed that they will release my offer letter in a couple of days, but it's been more than a 20 days now and still I haven't got my offer letter and also no updates.I don't see my hr poc also responding to my mails.

Please help me in getting the offer letter.