Disinstallazione impossibile

if you need to cancel your subscription so you no longer are billed, check https://helpx.adobe.com/creative-cloud/help/cancel-membership.html

p.s. if you're cancelling an annual plan early, there's a penalty (=1/2 the cost of the remaining months).

if the above link doesn't help you cancel, using a browser that allows popups and cookies, contact adobe support during pst business hours by clicking here and, when available, click 'chat', http://helpx.adobe.com/x-productkb/global/service-ccm.html 

if you're trying to uninstall any adobe programs, you don't need any email confirmation.  if you need help uninstalling:

uninstall everything cc including preferences, https://helpx.adobe.com/creative-cloud/help/uninstall-remove-app.html
then uninstall the cc desktop app, https://helpx.adobe.com/creative-cloud/help/uninstall-creative-cloud-desktop-app.html
clean your computer of cc files per http://www.adobe.com/support/contact/cscleanertool.html