I know I have the correct password and email because I can (obviously) log into spiral knight's website but when i punch them into the game, it accuses me of not having the correct "credentials"
am I missing something? I attempted with my user name and then saw that it asked for an email, yet it still did not work.
Can you tell us the whole error message?
You should also submit a support ticket, in case this is something that only Three Rings can fix, like account/computer associations: https://www.spiralknights.com/support/#mail