In my Windows Azure Management Portal, I still see the "3-Month Free Trial" subscription although it has already expired and been canceled automatically. I've deleted both the hosted service in it and also the database, but it still doesn't disappear.
What can I do to completely remove a subscription?
Visit the portal. In the upper-right corner, you should see a link for Billing.
This will take you to a list of your subscriptions.
Select your subscription. Then, on the right side, you'll see a few options, and one toward the bottom should be 'Cancel Subscription.'
According to the Azure support it is (currently) not possible to delete canceled subscriptions.
Greetings from Microsoft Azure. I reviewed your request and would like to mention that there is unfortunately no option to remove the disabled subscription from the Azure portal. This is by design to enable customer’s view the subscriptions purchased by them right from the day the Azure account was created.
I consider this a bad design choice but that probably is just me.
Additionally you also cannot get your account completely deleted either. You can request for subscriptions to be cancelled (as per original question) and Azure Support can action that but they can't/won't remove your actual account/login.
I cancelled a subscription a few months ago by calling support, and have had it sitting in the interface ever since. Recently they notified me that they are going to delete it (and its associated storage) soon. I expect it will disappear then. Therefore I think they keep the subscription around for a while in case you ring them up and say "Heh, I didn't really want to cancel that!".
You can remove your subscription via Azure PowerShell.
How to install: https://docs.microsoft.com/en-us/powershell/azureps-cmdlets-docs/
How to use: C:\PS> Remove-AzureSubscription "Test"
来源：https://stackoverflow.com/questions/10858470/completely-remove-a-subscription-from-management-portal