Pay Button Confirmation E-mail

Hi all,
Once customers use my ‘pay button’ for a quick checkout they receive a standardised order confirmation e-mail. The subject of the e-mail send unfortunately doesn’t display my sites name.
I have attached an example below (it is in Dutch). Translated it says: Thank you for your payment to '$ {data.businessName}."
I want the ‘data… Name’ to show my websites name. How do i do this? Thanks!

Did you fill in your site name from the control panel settings?