I got the licence on 89 usd...there are only two themes available for that price?
Yes. There are 2 themes. We already linked included themes in description of package https://awethemes.com/join so you could check before purchasing
We check and see an error because your server is not compatible with the theme options. We fixed it already. Now, the theme settings is ok
About Polylang, yes, both of the theme and Awebooking support Polylang. Please search the documentation of Polylang to translate menu (You should try with default theme - 2016 - first)
We check your site but see no error as your report
Menu displays correctly. Also, if you have any other question, please submit to the theme forum https://awethemes.com/forum/theme-support/hillter