WP admin page gives 404
I have a problem with my admin page of the site http://www.fotoexpo202.nl . I can not reach the inlog anymore of this page: Not Found
The requested URL was not found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
This is what happened: I tried to remove, in the WP adminpage, a part of site URL. This must be: http://www.fotoexpo.nl/show and I tried to remove show. Unfortunately after saving, it went down. I also tried to contact my provider but they will not help me. My provider is Budget Webhosting in Holland. So, now, I can not anymore reach my site by WP-Admin and also the site is totally broken. What can I do to get it back? Thanks so much for helping! Regards Peter