Hi Christian,
If you are facing problem in making your site same as demo then you can follow this documentation; https://www.styledthemes.com/documentation/pro-themes/styledmag-pro/
And if this is not helpful to you then you can purchase the demo installation($39) where we will make your site same as demo which helps you to use our theme easily by checking every back-end of the site. As well as you can make one test site and you can provide us the details where we will make your test site same as demo or you can give us your main site details to make the site same as demo. And please let us know if you want to make your site same as demo or not? so that we could provide you the payment link. We hope you understand.
We look forward to your respond.
Thanks