me cobraron aunque cancele el producto antes de que terminara la prueba gratuita

First check here, if you do not have a second plan, that you did not cancel: https://account.adobe.com/plans.

If you have a second plan, and you are still in the first 14 days of your paid subscription, you can cancel without an issue and the debited amount will be credited back automatically. If you are past the 14 days, or if you really do not have a second plan, I suggest you try contacting Adobe customer care. 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, you need to accept cookies! If the chat window fails to open, or is non-responsive, use a different device and/or browser to start the interaction.

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)

Important: Adobe does NOT contact you unsolicited by e-mail or direct message. If you get contacted by direct message from a person, claiming to be an Adobe employee, look at that profile and check if they bear the “Adobe Employee” marking under their name. Adobe support does not use Skype to give you support.
If in doubt, ask the forum.

On this page How to cancel Adobe trial or subscription
it says: