Cognizant Technology Solutions — offer letter not received yet 2019

Address:

Pune, Maharashtra

Hi,

I was interviewed for salesforce at sb road pune office on 24 aug 2019,

I was selected in interview. But waiting for 2 more weeks, i contacted hr for offer letter status.in next week, she said hiring is slow down you will have to wait.

Also i have 3 months notice period. I don't know then why they selected. Will they be able to offer joining? Shall i wait more?