Charged for subscription that I canceled prior to end of trail

I don't see any Adobe Stock subscription associated with the Adobe ID you are using here on the forums. If you have more than one Adobe ID you will need to sign in with Adobe ID/email address associated with your subscription. You can manage your subscriptions here: https://account.adobe.com

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(see also here: https://community.adobe.com/t5/creative-cloud-services/how-to-contact-adobe-support/td-p/11875703 or here
https://community.adobe.com/t5/account-payment-plan/how-to-contact-adobe-support/td-p/11843852)