IPhone will not let me unsubscribe to app
I just downloaded an app a couple of hours ago out of curiosity called "Astrology & Palmistry Coach", and after couple of swipes realized the content is not worth my subscription (which was required to access the app with the 7 day free trial). When trying to unsubscribe, the screen only shows a white screen with the name of the app on top. If you click on the blank space I either get a upgrade confirmation for $4.99 or $9.99 a week. The screen freezes after a couple of jabs in the dark. I do not want to be forced to subscribe to a unwanted app and would greatly appreciate help.
[Re-Titled by Host]
iPhone 6