I've tried both the mobile app and website but when trying to review an unlisted place I get prompted to search and it finds no results. I don't see an option to go ahead and write the review. Despite the help Page telling me I can do that.
I can't even find a way of contacting tripadvisor so I'm hoping this forum post works. It's taken me so long to try to figure out a way to do this or find an email from/address I'm close to not bothering.
I'm trying to add Hahndorf House because it's an awesome place to stay. :(