Unexpected Azure charge after cancelling free trial and unable to remove payment method

Hello Microsoft Azure Support,

I activated an Azure subscription for a free trial and used it only for a few days. After that, I cancelled my Azure subscription and also turned off auto-pay/recurring billing.

However, I have now received a bill/charge even though I cancelled the subscription. I would like to understand why I was charged and request a review of this charge because I only intended to use the Azure free trial.

I am also trying to remove/detach my debit card from the Azure payment methods. However, Azure is not allowing me to detach the card and shows the message “There are outstanding charges on this billing profile.”

Please:

1. Check why I was charged after cancelling my Azure subscription.
2. Confirm whether there is any outstanding amount on my account.
3. Review whether the charge is eligible for a refund, as I intended to use only the free trial.
4. Help me remove/detach my debit card from the Azure billing profile.
5. Confirm that no further automatic charges will be made.

Thank you.