XMission Control Panel/Billing Tab
From XMission Wiki
Your XMission account allows you to review your accounts billing history. This includes your balance, payment type, card of file, and recent activity of previous bill pay.
Payment Type - Manual/Automatic
To change your accounts payment type, navigate to your Billing tab in your XMission Contol Panel and open the Payment Type drop down menu. Here you can change your method of monthly payment choice.