Hi,
The HikaShop categories listing module that ou have on your left can only display two levels of categories at a time.
So there are two possibilities:
1. You turn on the "Synchronize with currently displayed item when possible" option of that module so that each time you select a category, the module will change to display the categories inside that left module.
2. You can use another accordion module for HikaShop, like this one which can handle many levels of categories :
extensions.joomla.org/extensions/extensi...hop-extensions/21225
