Cognizant Technology Solutions — offer letter not received from cognizant

Address: Cognizant Technology Solutions, 3rd Floor, Muthoot Technopolis, Seaport-Airport Rd,CSEZ,Kakkanad,Kochi,Kerala, Ernakulam, Kerala, 682037

Hi,

I have attended an interview in cognizant kochi on june 1st 2019. At the last round of interview i had salary discussion with hr and was handed an offer. I have accepted the offer. Hr informed me that i would receive the offer letter within a week. It is more than a month now and there is no news about the offer letter. I tried contacting them via multiple mails, but there seems to be no response.