Cognizant Technology Solutions — offer letter is not received yet it's been more than one month

Address:

Hyderabad, Telangana, 500038

I attended an interview at cts hyderbad (Mindspace) on 8th june 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. On 1st july 2019 i received an email from cts talent acquisition to upload my photo in one of their portal. I have uploaded after that, i did not get any updates. It's been nearly more than one month still i did not get offer letter.