Cognizant — not received any mail from cts

Address: 6-3-1100/4/2 somajiguda, Hyderabad, Andhra Pradesh, 500082

Hello. I'm Geethika. I have attended CTS interview for the role of a PAT on 23rd march 2019, at Hyderabad. The company has announced the results to our college t&p department on 25th march 2019. But till today i.e 15th june 2019 we haven't received any mail from the company. So when can we expect the offer letter? Approximately more how long will it take?