Cognizant Technology Solutions — Cognizant-Awaiting offer letter

Address: Chennai

This is Hema Sharma for the position for SAP FICO.
My interview took place on 18th Sept 2021 at 11.00 AM .On 19th Sept 2021 I received a call from HR Cognizant and he told me that I will receive the offer letter by next week .
On Thursday 23rd Sept 2021, I have received an email where it says that I have cleared HR discussion and offer is in progress and be ready the documents like education, experience certificate etc for Post offer.

Now, its 01 Oct'2021.I have not receives any email and recruitment team also not revert on my email.

Regards,
Hema Sharma