Cognizant Technology Solutions — offer letter not received after selection

Address: Pune, Maharashtra

I have attend interview on 1st march 2018 at cognizant pune hinjewadi office for java technology i have cleared all the rounds but till now did not recieved any offer letter, two weeks later on 14th march got call from hr asking for some details like notice period and education details then next day ie 15th march got call from another hr for confrming the position and salary then again next day ie.16th march got call from another hr asking me date of interview and saying he is begining the process of offer but after that i did not recieved any update about offer till now.