A support case was created for you and you should be contacted shortly by a Customer Support Representative, if you haven't been already. You can view and update your case at the Activision Support website. After logging in, go to "My Support" then "My Cases".
Try this link to the article in the Support Site for Ghosts Rank Reset: Activision Support Make sure you are signed in to your COD or Activision Account. Scroll to the bottom of the article and you can click on the blue bar saying COD: Ghosts Stats Corruption Tool.