Trying to edit the "Your IT Challenges" Carousel with Elementor, you'll notice that each slide item contains an Elementor template:

The easiest way to access these templates is to mouse-hover the "Edit with Elementor" link on the top Toolbar, locate and click on Slider 1 - H. IT Sevices, Slider 2 - H. IT Sevices, Slider 3 - H. IT Sevices and Slider 4 - H. IT Sevices sections

Clicking on each will redirect you to the template's content: 

You can also access the templates from Dashboard > Templates > Saved Templates: 

Make your customizations following these guides: 

Guide to Vamtam Elementor Builder