@Kalyan Goud Welcome to Microsoft Q&A thanks for posting your question.
Once you have chosen the option to Continue using database for additional charges**,** it is not possible to revert back to the free amount with auto-pause within the same billing period.
This is mentioned in the Azure SQL Database free offer FAQ
https://video2.skills-academy.com/en-us/azure/azure-sql/database/free-offer-faq?view=azuresql
The monthly free limits include 100,000 vCore seconds of serverless database compute and a maximum size of 32 GB of data.
You have two options you can set in the Behavior when free limit reached setting:
- Once the monthly limits on vCore activity or storage are met, the database can be auto-paused until the beginning of the next calendar month.
- This is the Auto-pause the database until next month option.
- Keep the database online, with vCore usage and storage amount over the free limits charged to your subscription's billing method, at the standard General Purpose tier serverless rates.
- This is the Continue using database for additional charges option.
You can Cancel the Subscription or if you have set up automatic payments, ensure to change or remove your payment method to prevent further charges
You can also find more information on similar post here https://video2.skills-academy.com/en-us/answers/questions/1423570/getting-billed-on-the-free-database
If you need further help on cancellation, please raise a support request.
Regards
Geetha