Hi @凱傑 詹 ,
the best option is to open a support case with Microsoft Azure support for clarification.
Azure Billing and Subscription support is offered by Microsoft by no cost and it's for free.
Source: Azure Support plans
In Q&A there is no chance to do the requested investigation. It has to be done by the official Azure Support channel/team.
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten