I would to cancel a subscription to Zoosk. This is where I was directed to get a refund and cancel
I want to get a refund on my subscription to Zoosk and cancel my subscription
iPhone XR
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To cancel a subscription (provided it was in fact made through iTunes and not directly with the makers) please see View, change, or cancel your subscriptions - Apple Support
Strictly speaking all purchases are final (after all, you can't very well return them): please see this page for information on requesting a refund: Request a refund for an App Store or iTunes Store purchase - Apple Support
However Apple have been known to be sympathetic in cases of actual error, so it's possible that they may allow you a refund as a one-off concession: but please be aware that they are under no obligation to do so: go to iTunes Store - Contact Us - Official Apple Support
Alternatively go to the page suggested in the Help page linked to above: Report a Problem