I dont want to renew my domain, help me to proceed the official procedure

I dont want to renew my domain, help me to proceed the official procedure

I have purchased a free domain (.in) from zoho a year ago to take my business online but I failed to do so and now I have changed my mind to take it online. So now i dont want this domain anymore. But recently I opened the MailBox and I saw that I have recieved a Mail from the Zoho team to renew the free domain for Rs.500 ($8) as my free domain period is now expired. But I dont want it anymore. So please tell me what to do now.