You are able to manage your billing address details, credit card details and view your invoices directly from within Buildxact. As well as manage your subscription.
In Buildxact from the left-hand navigation menu click "My Business".
Under "Business Account" click "Subscriptions".
Click "Manage Payments". Here you can update billing address, credit card details, and view your invoices.
In the pop up click "payment methods".
In the next pop up enter in your new card details and click "OK".