WPCode plugin automatically installed without permission

Why does the wpcode plugin appear in my WordPress installation without me installing it? First, it appears in the top administrative bar of my site when I’m logged in, indicating an error and it doesn’t appear in the installed plugins area of ??the site. When I enter the error, active scripts appear that I have not activated or installed. When I delete the snippets the plugin starts to appear in the side menu of my wp-admin and starts to appear in the list of installed plugins. I deactivate and uninstall it but the next day there it is again!!!!!! what could be happening? How do I resolve this? and many site users sent me screens that, when trying to access my site, are redirected to a page with a drawing of a little robot telling you to click “allow” if you are not a robot.

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