I am so very sorry to trouble you, and I've had this issue in the past, but have no idea if I should be contacting WordPress.com or WordPress.org. Anytime I visit a WP blog, my comments end in spam and I have to contact the site admin to request that the comments be removed. Not only is this terribly time consuming, but it's enough of a deterrent to make me consider moving my blog elsewhere. I have had this issue since I started blogging in Oct 2009 and don't understand why this keeps happening; I have a reputable blog and have never once left a spam comment!
Please let me know if I should direct my query elsewhere.