Quiero dar de baja el servicio

Try here: http://helpx.adobe.com/x-productkb/policy-pricing/cancel-subscription-acrobat-online-services.html

Hi @mtrebolle,

Hope you are doing well. Thanks for writing in!

We would suggest reaching out to our billing team on social media. They will be in the best position to assist you in real-time.

They can be reached at:

Facebook @ Adobe

X (formerly Twitter) @ AdobeCare

Hope this helps.