
Hi Siny Lim,
Thanks for reaching out to Microsoft Q&A.
Kindly follow this document to understand the unexpected charges- https://learn.microsoft.com/en-us/azure/cost-management-billing/understand/analyze-unexpected-charges
If you still don't understand why you received a charge or if you need other help with billing issues, create a support request
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