Rich Snippets for XTCommerce

Hello! Rich snippets for a xtcommerce 3.0.4 shop is the topic here. I want to get the "google stars" for my shop "[login to view URL]". Everything is already implemented and the rich snippets testing tool shows the result of my customer feedback (so it seems to be all good). The main key word for google is "demeyere" - then I would like to see the stars in the search results and also in my google adwords ads. Right now you cannot see anything. The website was designed including the rich snippets content about 6 months ago. I would appreciate any help and will pay a negotiable lump sum when the stars are visible with your help. Best regards, Benjamin