Hi @Ayush Katiyar ,
there are some limitations for a free Azure account:
The Azure Terms of Use agreement limits free trial activation only for a user that's new to Azure. If you had any other type of Azure subscription, you can't activate a free trial.
The information that you provided for your Azure account profile (including contact email address, street address, and telephone number) is correct. The credit card information is correct. You don't already have a Microsoft account that uses the same information.
Source: Troubleshoot issues when you sign up for a new account in the Azure portal
In these cases you could get the message "You are not eligible for an Azure subscription" .
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten