Hello, I canceled my subscription. I would like to request a full refund. I have not used the service. Please process my refund.

Hi there 

Hope you are doing well and sorry for the trouble, please check the help article https://community.adobe.com/announcements-14/how-to-cancel-acrobat-mobile-or-scan-premium-subscriptions-7293  to know more about the cancellation/refund  process and policy and see if that works.

~Amal