Cognizant — waiting for offer letter

Address: Hyderabad, Andhra Pradesh, 500001

Hello,

I had attended interview for sap abap position on 16th dec 2017 at hyderabad location, i had cleared 2 technical, managerial and hr round and i was informed that i will receive my offer letter in 1st week of jan 2018.
I had received one link to upload my passport photo but on 25th dec 2017 but after that i didnt received offer letter, its been more than 45 days. Please suggest what should i do?

Thanks & regards
Jaydeep bagtharia
+91 [protected]