Hi Akankshya Parida,
Greetings & Welcome to Microsoft Q&A forum! Thanks for posting your query!
I suggest few steps you can follow to remove your credit card details from the Azure portal,
Sign in to the Azure portal: Go to portal.azure.com.
- Navigate to Cost Management + Billing: In the left-hand menu, select "Cost Management + Billing."
- Select Payment Methods: Under the "Billing" section, find and select "Payment methods."
- Delete the Payment Method: Find the credit card you want to remove, click on the ellipsis (...) next to it, and select "Delete."
If you encounter any issues, such as pending charges or billing periods, you might need to wait until the end of the billing period to remove the card.
For more information:
https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/change-credit-card
https://learn.microsoft.com/en-us/answers/questions/656815/azure-subscription-and-removing-credit-card
Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.
If you have any other questions or are still running into more issues, let me know in the "comments" and I would be happy to help you