Cognizant — Date of joining( DOJ)

I am durga Sivakumar I have attended the interview in your esteemed company on February 14 th 2020 I was waiting for four months to receive the offer letter I got the offer letter by July and submitted all my documents on time and my end date to receive doj was given as December 31 st, but haven't received my date of joining Till now I will attach my details below

Candidate id:13086904
Candidate name : Durga Sivakumar