@kevinjamesmaguire For the record, to cancel your subscription, go to your user page. Click on 'Billing' (from the menu on the left), then 'Cancel Subscription' (one of the buttons in the top right).
If you want a refund, however, then you should email support as Kurzaa suggested.
For the availability of Hell Mode: Currently, the Reader's Library (Available to either 'reader' subscription) does not include that series.
The non-reader (and combined) subscriptions do apply to the series, but only during the pre-publication period of each volume (it varies a little, but approximately 4 months before publication to the middle of the month after publication). During that time, subscribers are given early access to the book, with one chunk being made available each week until the entire book is readable.
Unfortunately, none of the series is in this window - Volume 11 left pre-publication last month, and volume 12 has not yet begun its pre-publication period.
Purchasing a book does give you permanent access to it without requiring an active subscription - both online, and a downloadable copy. There is a subscriber discount for purchases... But, honestly, if you're only interested in that one series, you're better off asking support to refund the subscription and then buying the books individually at full price.