Cognizant Technology Solutions — offer letter not received for interview on 23rd june 2018 at f-3, embassy manyata business park (bangalore)

Address: Bangalore, Karnataka, 560037

I was interviewed on 23rd june 2018 at f-3, embassy manyata business park (Bangalore) for for mainframe technology in cognizant.
I cleared all the rounds and including hr round. I was asked to fill a form with all my details on the same day.
Hr told me that within 1 week i will get the offer letter.
I have not received any communication from cts team.

Kindly let me know sir what is the status of my offer letter.