ga_west

Sorry, correct should be
$file = WP_PLUGIN_DIR . '/woocommerce/includes/admin/settings/class-wc-settings-page.php';

Ok, understand. But do you know that you can change the name of the payment method when getting success response from Mollie? As I know, you have a payment method info in the Order. I’ve written a workaround for now, because the payment method was very important in our case, but this requires an additional API call to Mollie. Anyway, we can live with that but just would be nice to have everything clear.

Ok, so I can’t upgrade and should stay on 3.5.8, unfortunately.

Hello @meminyilmaz!
Make sure you have attached it to correct emails here in the settings https://prntscr.com/kf6mbl

New order – this email goes to admin only.
Customer invoice – right email where the customer should get an invoice.

Found the issue, it was my fail with the settings.