If you’re on an iPhone, please follow this path to cancel a subscription:
iPhone > Settings app > tap [Your Name] at top of screen > tap Subscriptions > scroll up and down to view active subscriptions and inactive/canceled subscriptions > tap sub subscription you want to cancel > tap Cancel Subscription (in red text).
Please note, if a subscription is not canceled at least 24 hours before renewal, you will be charged.
If you want to make a request for refund for a subscription, please follow instructions in the support article linked below.
Subscriptions and Billing - Official Apple Support
Request a refund for apps or content that you bought from Apple - Apple Support