Cognizant Technology Solutions — offer letter not received 2019 feb

Address: Chennai, Tamil Nadu

I completed my interview on 16th feb 2019 in kandanchavadi chennai location for java position. I completed hr discussion on the same day. Three days after the interview i got system generated confirmation mail that i got selected. After that they asked me to fill candidate information sheet (Cis). I sent this on same day. But still i didn't get any update after that. Did anyone receive the offer letter who completed interview on the same day.