Hello,
Try the following:
- Delete the current Resource Group, Resource and the Subscription
- Create a new Subscription
- Create a new Bing Search v7 resource with a new resource group
- Use this new Bing Search v7 resource
You may need to wait some time after you create this for the error to clear up.
If you are still having issues try reaching out to Azure Billing Support:
https://azure.microsoft.com/en-ca/support/create-ticket
If this is helpful please accept answer.