Cognizant — Delay in releasing offer

Hi Team,

I am Janardhan Thammisetty, I have attended 2 rounds of technical interview and got confirmation mail on 24 November 2021 saying that I got selected and to submit all the required documents and CIS form. I have sent all the required documents along with CIS form. Next day received call discussed regarding package and all, after that confirmed I will receive offer letter.
But It is been 10 days still I have not gotten my offer letter.

Please help on getting offer letter.