Unable to create Azure Billing Support Request for unexpected Azure Key Vault charges after deleting all resources

Hello,

I am looking for advice because I cannot contact Azure Billing Support through the Azure Portal.

Background

I created an Azure subscription named Azure OpenAI Sandbox for personal learning and testing.

The resources I created included:

• Azure OpenAI
• Azure AI Search
• API Management
• Storage Account
• Azure Key Vault

After finishing my testing, I deleted all Azure resources.

Later, I unexpectedly received a bill for JPY 374,822.

According to Cost Analysis, almost the entire charge comes from Azure Key Vault.

Approximately:

• Azure Key Vault: JPY 321,399
• Azure AI Search: JPY 28,648
• API Management: JPY 8,642
• Azure OpenAI Models: JPY 1,300
• Others: very small

I also disabled the entire Azure subscription immediately after noticing the unexpected charges.

Problem

When I try to request a refund or create a Billing Support Request, Azure Portal always redirects me to the self-help page.

If I choose Request Refund, I receive the following message:

This invoice is not eligible for Priority Refund. Please contact Support.

However, Azure Portal does not allow me to actually create a Billing Support Request.

Therefore I have no way to contact Azure Billing.

Questions

1. How can I contact Azure Billing Support when the portal does not allow me to create a support request?
2. Could Microsoft investigate why Azure Key Vault continued generating such a large amount of charges after I had already deleted all Azure resources?
3. Is there another Billing Support channel available when the Azure Portal cannot create a support request?

Any advice would be greatly appreciated.

Thank you.

Hello,

I am looking for advice because I cannot contact Azure Billing Support through the Azure Portal.

Background

I created an Azure subscription named Azure OpenAI Sandbox for personal learning and testing.

The resources I created included:

• Azure OpenAI
• Azure AI Search
• API Management
• Storage Account
• Azure Key Vault

After finishing my testing, I deleted all Azure resources.

Later, I unexpectedly received a bill for JPY 374,822.

According to Cost Analysis, almost the entire charge comes from Azure Key Vault.

Approximately:

• Azure Key Vault: JPY 321,399
• Azure AI Search: JPY 28,648
• API Management: JPY 8,642
• Azure OpenAI Models: JPY 1,300
• Others: very small

I also disabled the entire Azure subscription immediately after noticing the unexpected charges.

Problem

When I try to request a refund or create a Billing Support Request, Azure Portal always redirects me to the self-help page.

If I choose Request Refund, I receive the following message:

This invoice is not eligible for Priority Refund.
Please contact Support.

However, Azure Portal does not allow me to actually create a Billing Support Request.

Therefore I have no way to contact Azure Billing.

Questions

1. How can I contact Azure Billing Support when the portal does not allow me to create a support request?
2. Could Microsoft investigate why Azure Key Vault continued generating such a large amount of charges after I had already deleted all Azure resources?
3. Is there another Billing Support channel available when the Azure Portal cannot create a support request?

Any advice would be greatly appreciated.

Thank you.