You can customise your payment interface by adding your logo. To do that:
From your Virement Maitrisé space, go to 'Shops' or 'Developers' and then 'Applications'.
Select the shop or application you want to customise.
Select the 'Payment' tab.
Go then in the 'Online payment page' section. Import there your icon in "pictogram" format.
Click on 'Save changes'.