Cognizant — Joining Issue

Address: Chennai

I have attended my Interview in 2020 before covid lockdown and I got my Offer letter on December 31st, 2020 and even I accepted the offer and proceeded with the background verification but still there is no responses from your side. Could you assist me through this issue and help through it from your side. If its necessary to attach any screen shots regarding my offer I am ready to share through mail.