KingDerp I checked the fine print on the terms of service that we all agreed to in order to use the app. Part of that terms of service agreement has a clause where you sign away your right to sue them in court if you agree. You have to take anything to arbitration unless it can be handled in small claims court.
My guess is that you would have to track down whoever the CEO is of the group who runs web novel and serve them a summons for small claims court in their own jurisdiction which is in China I am assuming.
I could be wrong, not an international litigation lawyer. I read that several people went the route of contacting iTunes, google pay, or whichever service that they used to pay for the privileges. This seems to me to be the easiest and most prudent route.
I certainly wasn’t thrilled with the privilege program myself but I also read the fine print before I purchased so I knew what I was getting into. It was my decision and I enjoyed reading ahead even for the brief time I got to do it. I hope that helps, just saw your post and thought I would check out the terms of service for you. May want to take a look yourself.