Cognizant — offer letter not received

Address:

Ghaziabad, Uttar Pradesh, 201013

I have attended the off campus drive on 1 june 2019 at galgotia institute of technology and management at greater noida. I have cleared my amcat test then cleared my technical and hr round. On 6 june 2019 i got my confirmation mail saying that your document verification is under process and background check is going on you will be inform in 3-4 weeks but still i have not received any kind of email from you're side.
Please tell me the status of my interview.