Horrible antiquated app

I downloaded the App and then paid for my subscription thru Apple like I have with a few magazines and journals. I get confirmation from Apple that my money has been debited. But I cannot get the app to let me register and use the service. It goes in circles. Of course they do not have a call center that has technical trouble shooters beyond 6pm. How do I get my money back?

pahndeepah about The Nation Magazine, v5.8