Shop App - how to change "New Arrivals" items?

PrimRenditions
Tourist
4 0 2

I just recently added the Shop app.  How do I change the three items that appear in the preview for my shop?  

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PrimRenditions
Tourist
4 0 2

How do I get help on this???  Chat doesn't work, no phone number to call anymore, and emails go unanswered. 

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