You don't want to go overboard, even if it they WERE wrong for marking it as spam. That's on them, not you. Take the higher road and go on with your day. I believe, even online, that you reap what you sow. I believe you made some honest mistakes, but now you have to learn from those mistakes. =)
Now go pop a bottle of orange soda and relax!
Now go pop a bottle of orange soda and relax!