Hi,
to see your credit balance, these are the steps to accomplish this
- Log in to the Azure portal as a subscription Owner.
- Navigate to the Billing subscriptions module, and on the Billing scopes tab check the box "As a Global administrator, check this box..." to make sure all options are displayed to you.
- Click the Billing scope from the list that is used on your subscription.
- On the Overview tab on the left, navigate to the Summary tab at the top.
- Your credits remaining on the subscription will be shown in the bottom right corner.
To delete all resource not in use, I would start at the subscription scope(s), and then go deeper to the resource groups or directly to the the specific resource an delete it. If you want to bulk delete resources delete the resource group and all resources inside will be deleted. There is no Out of the box solution to know which resource is not used. You need to know it or find out via monitoring, logs and queries.
To get notified when the credit limit is reached, I would create a cost alert in the cost management of azure and set the amount to the credit limit. There you can also enter an email address to get notified.
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