You have seven days of a Free Trial, in order to cancel your Free Trial before you are charged, follow these steps please:
PROFILE > Settings > Manage Subscription > you will be directed to the iTunes store > Cancel Trial (on the bottom of your screen)
You may go through the iTunes App Store:
- Launch the Settings app.
- Tap the iTunes & App Store.
- Tap on your Apple ID.
- Tap View Apple ID when the pop-up window appears.
- Enter your Apple ID password, Face ID, or Touch ID when prompted.
- Tap Subscriptions.
- Tap the Subscription you want to cancel.
If you do not see a CANCEL on your screen, you are either already canceled or have already been charged. Please check your iTunes Purchases.