I bought the adobe pdf and it says in the description that you can turn off the auto renewal but their isn't a setting button so you can.. In the My Accounts also no way to turn it off.. Mine was done by a iTunes account.
Hi patches1966 ,
Have you contacted Apple support Yet?
Please take a look at the following pages for turning off auto renewal.
(See the "Cancel a subscription purchased through the Apple iTunes App Store" section.)