Talk to Slider then, about getting out a fix, I guess. I doubt you'll find much help here... this isn't even the editing forum.
A lot of "hacking" I've seen has come from people sharing admin (or "sub admin" via mods) with unreliable people and then it coming back to haunt them. Some mods have extra vulnerabilities within them too.
I'd say IP ban these guys if possible, change your passwords. Good luck!