refund request

If you properly cancelled, you will automatically receive a refund within 14 days.

See here:

https://helpx.adobe.com/manage-account/using/creative-cloud-subscription-terms.html

and here:

https://helpx.adobe.com/manage-account/using/cancel-subscription.html

You need to have a valid form of payment before you can cancel a subscription and get a refund.

https://helpx.adobe.com/manage-account/using/update-billing-information