Cognizant Technology Solutions — no confirmation mail for offer letter

Address: Indore, Madhya Pradesh, 452003

I have given interview at bhopal in pool campus drive on 12 of feb 2019 at lnct, after 1 -2 week i got call from collage that i got selected in cts, but it has been almost 3 months and i have not received single mail from cognizant and as it is a pool campus drive i dint have contact of hr. How much time it usually takes? Is here anyone who can give me contact of hr.