Styling for this sucks

This plugin works good but it’s a bitch to style. How do I get rid of the table borders? No matter what I do, I can’t get rid of the damn borders! I’m even using the custom style sheet in the sl-uploads and have checked my theme to make sure nothing is overriding the styles for this. I can’t get it to style right!

https://www.ads-software.com/extend/plugins/store-locator/