Cognizant Technology Solutions — offer letter not released by cts

Address: Kolkata, West Bengal

I gave java interview for 18-35 months experienced candidates on 21st april 2018 in techno india college kolkata and cleared all the rounds (Including sal discussion). Hr told the offer letter would be received within a week or two. Still i did not get any update or communication from cts. Very few people whose notice period and expected salary was less only received offer letter. Please resolve this.