Thank you for purchase our theme.
Please login to your account and go download.
There are two zip file
1. theme.zip file (Some browser auto unzip the file so need to zip again before uploading in WordPress)
2. doc and child theme zip file (Some browser auto unzip)
* doc file
* child-theme.zip file
I think your browser auto unzip the files so please zip the first file again and install the WordPress.
I hope now you can install the theme in your WordPress site.