Since the subscription was done directly in the Google PlayStore or Apple AppStore (depending on the device you are using), you must also cancel it there. Unfortunately, we cannot do this for you.
Apple App Store:
In the home screen, click on the profile in the upper right corner. There scroll down and click on Manage subscriptions. There, click on the active Hunting Guide subscription. Now scroll down here and click on Cancel Subscription.
On the PlayStore home screen, click the Menu button in the top left corner. There click on Subscriptions. In this view, click on the current hunting companion subscription. Click on Cancel Subscription in the lower part of the screen. Finally, confirm to cancel the subscription.