Normally, you can delete your own posts, but IIRC that isn't possible for the first post of a topic with replies because the SMF forum software doesn't like orphaned posts.
There's a 'Report to moderator' link at the bottom of every post you see. Its usually used for reporting SPAM and gross violations of nettiquette, but in this case you can use it to report the first post in this 'reposted' topic and request deletion of the whole topic.
@moderators: I am happy for you to delete this topic including all my posts in it.