Cognizant — Loi/ Ol

Dear cognizant
My name is Muralikrishna Ponnam
I'm recently Successful Tr 31-03-22and04-04-22HR completed
I'm received rejection mail on May 2nd
But 16th May on superset shows offered to enrolled I'm asking to superset they replied to my quaries please wait he send loi
But I'm not received any loi /ol mail from cognizant infrastructure graduate trainee /Engineer trainee role
Here may also completed so many persons receive loi/ol
Cognizant mentioned eligible criteria 50% all
But why are you not given loi offer letter
Please Give me loi