To cancel your subscription on Iconfinder, you need to first go to Your account page.
On Your account page, you can see the details of your subscription plan. To unsubscribe, click on the Cancel subscription button, as in the screenshot below.
Cancelling means that your subscription will not be automatically renewed anymore. Once you are in need of icons again, you can reopen the subscription from Your account page.
❗ Note: When cancelling, you will also lose the free access to your already-downloaded icons and you would need to buy them again. Make sure to save your downloaded icons before cancelling.