Yes, we do provide installation service. Here you can purchase standard WordPress theme installation for your website to look like demo website.
The standard WP theme installation service includes: theme installation, trouble shooting (if needed), initial set up, widget setup, theme settings, hosting setting adjustments (i.e. php.ini, htaccess, memory limits; that is if your hosting allows that, otherwise we will recommend you changes that need to be made if hosting package is not sufficient).