1. Go to the Azure Support page
You can reach support from here: Portal → Help + support → Create a support request
Alternatively: https://portal.azure.com/#view/Microsoft_Azure_Support/HelpAndSupportBlade
2. Choose the right options
Issue type: Billing
Problem type: Payment, charges, or invoicing
Problem subtype: Unable to pay / past due balance
Billing support is free, so you won’t be charged anything.
3. Submit the ticket
Support responded and manually cleared the past-due 11 cents on their side. After they closed it, my subscription went back to normal and there was nothing left to pay.
Why this happens
For extremely small amounts (like a few cents), the system sometimes blocks automatic payment attempts and requires support to clear the balance. It’s a known behavior with old inactive subscriptions.