Do you have a link to the website?
What browser are you using?
If you are using Firefox browser, do you have Firebug?
If so, inspect the element you want to change, and edit the css directly in your browser using Firebug, or developer mode for other browsers to found out what specific selectors to add the “display: none” declaration to. Then go into your themes folder (wp-content/themes/”your-theme”/styles.css) and edit the styles.css file. Using Firebug, or other development tool, it should show you approximately what line in the file where the selector is you need to add the declaration to. You should also avoid changing the styles for the parent theme, but rather create a child theme so whenever you update, your changes are not affected. Good luck!
