Cognizant Technology Solutions — Delay for offer letter

I am Akshay Suryawanshi . I have attended all rounds of interviews on 3 December and 4 December 2021 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 required details and replied back.

Later on, I got 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 in advance.