From Where you would set the order received page?

To work time and date properly with your time you need to settings restrofood plugin timezone from restrofood settings and WP admin settings -> general Restrofood settings option: WP admin settings option:

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Download The copy of the plugin as a zip file, you can manually upload it and install it through the Plugins admin screen. Navigate to Plugins > Add New. Click the Upload Plugin button at the top of the screen. Select the zip file from your local filesystem. Click the Install Now button. When the installation is complete, you’ll see…

Go to Appearance -> Themes -> Add New -> Upload Theme -> Browse and Install Now You will need to install some required plugins to work the theme properly. Follow the below screenshot.

Upload the xml file. Note: You should upload restrofood product xml first then restrofood media xml file