You can review and update your billing details or download past invoices for your account from the Billing Portal.
To access the Billing Portal,
Log in to your Digify account as Admin.
Click on your name on the top-right corner and select Admin Settings*.
Under Billing, click on the Launch button beside Billing Portal.
*Lite Plan and Classic Pro Plan (Pro Plans that were activated before June 12, 2019) will see Billing instead of Admin Settings.