(1) Are your referring to a wordpress.COM blog?
If so how would we know that? You have not provided url for the blog in question and your username is not linked to a blog.
(2) Is there a warning notice on your blog that contains a link to use to contact wordpress.COM staff?
(3) Assuming you are actually referring to a wordpress.COM blog, then dcrage has provided you with an important link and here is even more information.
No advertising is allowed on wordpress.com blogs as they are non-commercial blogs. The only exception is for VIP blogs
no advertising - http://en.support.wordpress.com/advertising/
Types of blogs. Take note of the "Affiliate marketing blogs: section. http://wordpress.com/types-of-blogs/
No business transactions can take place on wordpress.com blogs and they cannot be used to drive traffic to third party sites. (TOS section 2 5th bullet)
I believe you need to contact Staff http://en.support.wordpress.com/contact/