Hello Upendra Akki,
Welcome to Microsoft Q&A Forum, thank you for posting your query here!
Sorry for the inconvenience that may have caused to you. For refund related queries or issues please contact Azure support request.
Please make sure to provide all the details properly, because you'll be prompted for more information, which can vary depending on what type of issue you selected.
please go through the Problem description and fill out the service type like "VMs continue to incur costs unless they've been appropriately deallocated" and problem type as billing.
Then follow the document and create a support request. the support team will help you accordingly.
Hope this helps!
Please reply if there are any challenges.
Please do not forget to "Accept the answer” and “upvote it” wherever the information provided helps you, this can be beneficial to other community members.it would be greatly appreciated and helpful to others.
Thanks