Hi @Kartik K
Can you confirm that you never paid for Azure before? Free Azure services only applies in that scenario.
The Azure SQL Database plan you were looking at is the Basic one, with the free service, you are entitled to use the Standard S0 with 10 DTU.
250 GB of SQL Database standard S0 instance with 10 database transaction units 12 months
https://azure.microsoft.com/en-us/free/free-account-faq/
If you have question I would recommend you to reach the team using the phone number provided on that page.
--I hope this helps. Please Accept it as an answer and "Up-Vote" the answer or message(s) that helped you so that it can help others in the community looking for help on similar topics
Regards,
Didier3001