Hello @asdfsdfgdfgh,
Since you don’t seem to be having any luck updating the mime-type of your server I recommend you use the plugin’s template feature so you can provide your own icons.
You can read about how do to this (with a credit card form but the process is the same)
Creating a custom template
What you want to do is create a folder in your active theme directory called woo-payment-gateway/checkout/payment-method-icons.php
. The plugin will use this file instead of the standard file. You can then change the following line.
<?php printf('<img src="%s%s%s%s"/>', $path, 'img/payment-methods/', $method, '.svg')?>
to something like:
<?php printf('<img src="%s%s%s%s"/>', get_stylesheet_directory_uri(), 'img/payment-methods/', $method, '.png')?>
You will want to add your own card png’s to the theme’s img/payment-methods
directory. When you name the png files, make sure to use the same naming convention that the plugin uses. So visa.png, master_card.png etc.
You can find all the png files that were used in prior versions at the following location:
Card PNG files
Kind Regards,