Help us increase conversions by optimizing our payment page

Hello, We would like to optimize our conversions by modifying our payment page. I attached the payment page and the success page. I\'m sure we can increase our conversions on this page by making it look more secure, more professionnal, more modern, etc. The only requierement is simple, you need to keep at least all the elements that appear on the page, you can add images, buttons, styles, etc. But we absolutely need to keep every information and logo. We can move objects but we can\'t delete them. Maybe the conversions will increase if we make the payment page look like our website ? Let me know your ideas. You can see the form online using the [login to view URL] file Best regards, Johan