I can help you get your domain pivotleader.com where you want it. However, first I need to confirm that you own the domain you're trying to move. Since that domain was purchased with a different WordPress.com account, can you please log in to that account and then reply here to confirm that you want to move it?
Also, can you please give me a link to the blog you want to use the domain with?
Finally, do you want to transfer ownership of the blog and the domain to your WordPress.com account angelapivotleader?
Please let me know if you have any questions about that. :)