From your description sounds like your trying to show collections within collections?
Without seeing the setup and spending time reading any code you've created the simplest method is create a menu of those subcollection then you can use a linklist object to step through which collections are shown and through that linklists list of collections get the images of each linked collection.
Lots of info on the forums about using linklists to create functionality.
If you just want to get this customization built contact me at paull.newton+shopifyforums@gmail.com with this topic url, store url, theme and use-case details.
