Theme will not upload "cannot find styles.css" (it is in a folder!)

Hi, I am trying to download a theme but it says it can not because it is missing a styles.css file: I have tried, according to your support to download a new theme under Apearance/Themes… didn’t work. So I tried your second suggestion:
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Adding New Themes by using cPanel

If your host offers the cPanel control panel, and the Theme files are in a .zip or .gz archive follow these instructions. Note: This assumes the Theme you download is a compressed (.zip) file containing a folder under which all the Theme files reside.

Download the Theme .zip file to your local machine.
In cPanel File Manager, navigate to your Themes folder. If your WordPress is installed in the document root folder of your web server you would navigate to “public_html/wp-content/themes” and if you have WordPress installed in a sub-folder called wordpress, you would navigate to “public_html/wordpress/wp-content/themes”.
Once you’ve navigated to the Themes folder in cPanel File Manager, click on Upload file(s) and upload that .zip file you saved in Step 1.
Once the .zip file is uploaded, click on the name of that file in cPanel, then in the panel to the right, click on “Extract File Contents”, and that .zip file will be uncompressed.
Follow the instructions below for selecting the new Theme.
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I can get the file uploaded but I can not find where you click to unzip it. I click on the theme and I see no option to unzip anywhere. Where is that option?