If you choose to no longer use Security Ninja there are several ways to cancel your subscription.
Remember: Just deactivating and removing the plugin DOES NOT cancel your subscription.
There are many ways you can choose to cancel your subscription:
The fastest and easiest way is when you deactivate the plugin to check the “Cancel subscription” option.
If you have already deactivated the plugin there is also a way to deactivate from your account page:
https://wpsecurityninja.com/account/
Log in with your email and password – use the same email as when you purchased the plugin.
Go to the tab named “Renewals & Billing”
Click the subscription you want to cancel. On the right hand side a list of options appears – here you can click “Cancel Auto-Renew” and follow the instructions:
When Security Ninja first started, the plugin used Gumroad as a payment processor. Since 2019 when the plugin was taken over, all new subscribers was changed to Freemius.
https://customers.gumroad.com/article/192-how-do-i-cancel-my-subscription
Check out the second option, “2) Cancel from your receipt. ”
Please search your email inbox (remember to check the spam/junk folders also) for “Gumroad” and check out the instructions for cancelling there.