Cognizant — didn't get offer letter yet.

I have cleared all round of interviews which held in december 2017 for the position of wan brm in pune location. My poc was nithin saji. However i didn’t got offer letter. I have uploaded the photo, cv and all details in cognizant portal.
Now nithin says that he is not poc for that post. He is not able to resolve this problem. Still i’m waiting for offer letter.