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. =)
Alright, I see you posted the topic asking why your other topic got locked. That's good, but you might want to edit it and add a link to your topic where we you asked us to sign up. You can find it in your list of threads posted.
I really don't want you to get in trouble, but I'm really not sure what you should do... I'm just telling you what I would do.