Subscription troubles
So I recently signed up for a one week trial for an app, knowing I only needed one use out of the app. After I was done I deleted the app, thinking it would delete the subscription(duh). But unfortunately it renewed the subscription without my knowledge, however I don’t currently have enough money to pay for the subscription, so I currently cannot update or dowload apps. I removed the subscription but it still says it is active! Can anyone help me with this, because it feels like I am being scammed out of my money!! I do not want to pay for the subscription(that I didn’t even have the app on my phone for)!
iPhone 8 Plus, iOS 12