Cognizant Technology Solutions — Not received offer letter and even HR is not responding

Address:

Banglore

I have completed my two rounds of interviews on 12th April 2022 and 13th April 2022.

After that i also got a mail from HR on 13th April to fill CIS form and submit last 2 months salary slip and my Id proof.

All the mentioned documents are submitted to the HR.

Then HR from Cognizant called me on 29th April and salary negotiation also completed and i got positive feedback from HR and
HR told me by next week i should get the offer letter

Still I have not received offer letter.

Also HR is not responding to call and mail