I´m trying to add something like a guestbook, where the user can write about our services, something like comments with few more content like country, facebook page... should i do this with a single page extending the default comments using with wordpress or i have to add a new content type? How can i give the user permission tu publish without register?
The easiest way by far would be as you suggested to use a page coupled with comments. Restyle it so that it looks more like a guestbook.
I'm sure there are plugins out there that do this but I don't see the point as you'll need to restyle them anyway and it just slows down your site.
I would use a custom page template that pulls output from a custom post type. You could have a form at the bottom of this page which would allow users to submit their own content.
The page template and post type are easy, just a file and
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