Cómo canceló un plan y pido el reembolso?

Hello @Agustina5C92 
Look at the following link for information on how to cancel your subscription.
https://helpx.adobe.com/manage-account/using/cancel-subscription.html

For refund rules, refer to the following link.
https://helpx.adobe.com/manage-account/using/creative-cloud-subscription-terms.html
If the information does not help, then you need to contact support.
Login to your account and navigate to the URL below. Make sure that the browser has cookies enabled, and all script blockers are disabled.
https://helpx.adobe.com/contact.html
Click on the chat icon on the bottom right, and type AGENT to avoid bots and talk to a human.
Also, be mindful of answering anyone who sends you a private message. See the following for more information about scammers
https://tinyurl.com/y7cfrr7y
-Manan