How to cancel a subscription
Go to Leaky Paywall -> Subscribers and find the user you would like to cancel. From here, go to "Switch To".
You will now be logged in to the account of the user. Find the My Account page in the menu bar and proceed to "Cancel your subscription". You will be prompted by a secondary "are you sure" page which is where you'll confirm the cancellation.
Once complete, make sure to switch back into your account. You'll see a switch back link at the bottom left corner of your screen. This will take you back to your admin dashboard.