kerashop.jp backorders?

Hello , I was wondering if anyone had any experience ordering from kerashop.jp? I ordered a few items and some of them are "backordered", and they said that they are not sure about a "release date". I can't really tell if they are sure they are going to get the items back in at all ? ? I haven't gotten an answer for that question yet. I'm wondering if it would just be easier to cancel those orders and just try and get the items from the original brand's website. So I'm just wondering if anyone has been in a similar situation? Thanks