If you need to contact an admin, please join our server and if one is on, explain your issues.
If not, you may contact Quake. If it is not urgent and can wait, you may message him on the forums. He is on forums at least once a week. But, feel free to message him or add him as a friend on steam, even if it isn't urgent.
His steam url is /getquakedfoo. He will be able to assist you with your needs. He checks his messages daily.