Cognizant — cts did not release offer letter

Address:

Bangalore, Karnataka

I was interviewed in november and got selected in cts bangalore. I had my hr round and was informed that offer letter will be released in a week. Its been more than 2 months and i didn't get any response from them. The person from cognizant who arranged the interview doesn't reply to the mails. Same thing is happening with other candidates who were selected.
This is such a bad image being projected by a company like cts.
If there was no requirement they must not have conducted interview and after getting selected, its their duty to keep us informed or to atleast respond back to our mails.
Such a disappointment!!