First make sure you have Elementor and Contact Form 7 plugins installed .
Download the Plugin
Go to the Codecanyon Download page and find the Elementor Widget for the Contact Form 7 plugin and download it.
Upload the Plugin to your Website
From your WordPress admin panel navigate to Plugins > Installed Plugins.
Click Add New at the top of the page, then click the Upload Plugin button.
Installing and Activating the Plugin
Select the plugin zip file on your computer and click Install Now.
Once the file is installed, click Activate.