Cognizant Technology Solutions — I didn't receive my offer letter after given my hr interview

I am K HariPrasad. I have attended all rounds of interviews on[protected] and[protected]
I 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 the required details and replied back.

Later on, I got an HR call and discussed about my package and designation, after that HR confirmed that
they will release my offer letter in 2 days, but it's been more than a month now and still, I haven't got my offer letter and also no updates.

Please help me in getting the offer letter.

Thanks & Regards
K Hari
[protected]