First of all, you have to create a CSS file as follows and put it into a folder in your theme or else you can link the following CSS link of mine without creating a one.
https://androidwedakarayo.com/assets/built/commento.css
Then you have to replace your code as follows.
<script defer src="https://androidwedakarayo.tk/js/commento.js"
data-css-override="https://androidwedakarayo.com/assets/built/commento.css" data-auto-init="true"></script>
<div id="commento"></div>
If you have created a CSS and put it into your theme, then you have to replace it with your path.