Remove a app

Press lightly on the app icon until it jiggles, then tap the X.

Or:

1. Launch the Settings app on your iPhone or iPad.
2. Tap General.
3. Tap [Device] Storage.
4. Select the app you want to delete.
5. Tap Delete app.
6. Tap Delete to confirm that you want to delete the app.

Then:

View, change, or cancel your subscriptions

Request a refund for an App Store or iTunes Store purchase

iTunes Support

First, cancel the subscription as described in this link-->View, change, or cancel your subscriptions - Apple Support

If you are not being billed by Apple, this is the alternative-->Get help with subscriptions not billed through Apple - Apple Support

AFTER canceling the subscription you can delete the app: Hold your finger lightly on the app until it wriggles, then tap the X in the corner. Press HOME when done.

See the following: View, change, or cancel your subscriptions - Apple Support