Cognizant — offer letter was not received

I attended an interview at cts kandanchavadi on june 1st 2019 and cleared all the rounds. At the end hr informed me that i will receive my offer letter in a week but i haven't received yet. Meanwhile i received an email from cts talent acquisition to upload my photo in one of their portal and received mail.. After that, i haven't received any updates. I am not sure if normally they would take almost a month to release the offer letter.