Cognizant Technology Solutions — Offer not released

I attended an interview view in July and cleared all the rounds. At the end, HR informed me that I will receive my offer letter in a week but I haven't received it yet. Meanwhile, I received an email from CTS talent acquisition to send documents via email. After that, I haven't received any updates. I am not sure if normally they would take almost five months to release the offer letter.

I had been waiting to hear the reply. Then I tried to contact the hiring team. I mailed many times to HR but received no response at all. I have raised my concern on the website also. That was also of no use.

It would be great if you expedite to send a reply to my concern.