Hi,
If you're sure you made the override for the correct template, then it's probably that you're overriding the wrong view file.
Please turn on the "Display view files" setting of the HikaShop configuration and look at the page on your frontend.
You'll see which view file is used there.
It's probable that it is product / listing_img_desc.php instead of product / listing_img_description.php
listing_img_desc is the old "image and description" layout which uses a table for the layout, and listing_img_description is the new one which uses divs and no table in its HTML.