Cognizant — No response from HR and Offer letter not received

I am done with my Technical round on Feb 9th. Received call from HR on Feb 10th and informed that I was selected and had salary discussion and requested to submit the documents. I have submitted the documents on Feb 10th. Since that time there was no update from the HR/ Cognizant team about when there are going to release the offer letter. I have sent 3 follow up mails but not received any reply.

Any assistance would be a great help to me.

I have only HR mail ID as communication channel but not receiving the response.

If there is any team mail ID distro yo whom I can reach out could you please share those details.