Hi @B
Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.
To resolve this issue, raise a support request with Azure billing and subscription management support. This ticket will allow you to work closely with support engineers and obtain a quick resolution to your issue.
Here is the link - https://docs.microsoft.com/en-us/azure/azure-portal/supportability/how-to-create-azure-support-request to create support case.
FYI: Azure Billing and Subscription Management support is included in the Basic Support Plan without any charge.
https://azure.microsoft.com/en-us/support/plans/
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Thank You.!