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Group- Category - Product link

Hi I cannot get it sorted.

In my Ecommerce,

I have

3 Groups : Cafe, Products, Beans
18 categories : classified within the 3 groups above.
many products under the 18 categories.

I can’t get my page to work.

PAGE : ONLINE SHOP : Show all the categories under GROUP : PRODUCTS & BEANS
PAGE : ONLINE CAFE : Show all the categories under GROUP : CAFE

IN EACH OF THESE PAGES, when we click any categories, the items will be shown below

A sample of the look and setting are done in ONLINE SHOP…

please advise… please help…