Rimborso abbonamento annuale

You should have cancelled before the renewal date, not after the renewal date. To cancel without early cancellation fees, you need to cancel in the last month of your subscription and the subscription will end at the last day of that subscription month.

The 14-day rule is valid only during the first paid period, not for renewals. I would suggest you contact Adobe customer care and ask for assistance for cancellation. Adobe customer care can be contacted by beginning a secure chat session at https://helpx.adobe.com/contact.html?rghtup=autoOpen. Pop-up blockers need to be disabled! If the chat window fails to open, or is non-responsive, use a different device to start the interaction.
Support phone numbers may be found here: https://helpx.adobe.com/contact/phone.html. Please note that phone charges may apply.

For support via Twitter:
https://twitter.com/AdobeCare

(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)