If a payment has failed, and you want to stop a future payment on it:
Navigate to the patient's profile
Click on 'Invoices' and click into the one that you want to stop
At the top left, you'll see the option to "Stop Retrying"
Once you click that button, Hint won't attempt to charge the patient for this invoice!
If a payment has been scheduled to run on a future date and you want to stop it from running on that date:
Navigate to the patient's profile
Click on 'Invoices' and click into the one you want to unschedule payment for
Click "Edit Scheduled Payments"
Click the trashcan icon do delete the scheduled payment
Save the changes by clicking "Save Scheduled Payments"
The invoice will now remain with a balance until action is taken.