Hi... If you're looking for the "Report Post" feature on any given post... Look for the graphic/link right beneath the post's number at the header of your posts.
For example: A post will be numbered within that thread as "2" if it's the second post. Right below that you find graphic/links stating "Report Post" and "Old" with the time the post was made.
Hope this helps, have a good day.
*Edit: Actually... You might not be able to find it that easily. Turns out that such a feature is eliminated from your posts' headers if you're the one viewing them.
To explain: I'm logged in right now. And I'm viewing the post I made in this thread. And because it's me who's viewing my own post, the "Report Bad Post" feature doesn't show up.
So if this made sense, you're going to have to either ask someone to report your posts/threads... Or do the more logical thing and just contact one of the moderators and ask them kindly to please remove your multiple posts/threads.
Again, hope this helps.