Magic Piano by Smule expired in the subscription management but apparently, not
I got the free 7-day subscription from this app exactly 8 days ago. I did nothing to cancel it since I had not found the option within the app. BUT, as I got problems with the bank (I'm broke), it did not charge.
I just learned that you can manage subscriptions through the app Apple provide for configuration and etc. There, it is expired. BUT it seems it isn't because I tried to update some apps and it requests for my credit card, not letting me select 'none' (not available). So I can't update, GMAIL and etc because of this credit card issue. I can't even reinstall this Smule app to search for some way to unsubscribe - it requests a card.
What can I do?
iPad mini 2 Wi-Fi, iOS 8.4, 16GB