Cognizant — didn't release offer letter after confirming as selected through mail (cognizant tag)

Address: Bangalore, Karnataka, 560100

Hi team,

I have given interview on 2nd december, 2017 at manyata tech park bangalore. I have cleared all rounds including hr on the same day and got confirmation mail from cognizanttag as my profile select and will release offer letter shortly. Now it is almost 2 months over, didn't get any response and tried to reach on several mail addresses including person who scheduled interview but there is no response.

Please help me to get an offer letter and thanks in advance.

Regards,
Balaji tumma
Mail: [protected]@gmail.com