Thread:Project:Support desk/Wiki spam and related problems

Hello, I am not sure this is the right place since my question is not related to the domain Wikipedia.org, but I really need help and I hope to find some expert that can advise me. In order to get my PhD, I am running this wiki website (http://www.ichscotlandwiki.org/index.php?title=Main_Page) created by Edinburgh Napier University. Since it has been recently assaulted by spam content because of the action of relentless bots which created thousands of fake pages, me and other two people with administrator access have started to block and prevent new creations of a lot of bots, so to stop the creation of automatic new pages and focus on the removal of the older spam. However, since yesterday all pages appear (as you can see even in the main page) as to don't have any text. They can't be even restored or modified as they wouldn't be in any section. I am asking here because neither I nor my partners have any idea to how to solve this problem. Is anyone able to figure out what happened?