Cognizant Technology Solutions — offer letter not released in spite of taking personal details

Hi,
I have attended an interview in cts on july 12th and i got selected. After two weeks i was asked to fill all my personal details to take it forward to release the offer letter. But it has been almost 2 months since the time i have attended the interview. They told that i. An expect the call letter within a weeks time but i haven't received the offer letter till now. Can you please look into this.