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Normally the theme name would be listed in the main CSS file on the site, which in this case appears to be http://www.zoompondy.com/wp-content/themes/zpondy/style.css,  but it seems to be missing (not sure how they got away with that one). Based on the amount of custom code in the style.css, I'd guess this is a custom theme rather than a child theme. In case this helps, they used what appears to be almost the same theme on this related site http://www.zoomsydney.com/, but that one doesn't give us any more details about a possible parent theme.

As Dmitrii mentions, disavowing links isn't going to change your rankings, especially overnight. Removing poor back links is an excellent first step, the next step is to get a well balanced SEO campaign planned out. Start creating some entertaining, helpful content pieces, then get that content in front of people. Build some high quality back links to the site, and continue doing it. Show the search engines you've made changes to move in the proper direction. It'll take time, but it'll be beneficial. Chris Adficient.com