Can you confirm that once you log into elite.callofduty.com and select 'Profile', you're being redirected to the homepage? Selecting profile should take you to this page - http://i.imgur.com/WLFNC5X.jpg - and enables you to link your account.
If you're unable to get to that page, try clearing your cache. Let me know if you get it sorted. :)
Yeh, from the Rank Reset Request Form, I got to as far as the 'Link multiplayer account with profile' and then it just took me to the page which you have shown, even though my accounts are linked.
But I tried it just now and managed to get to the page where I can select my Gamertag and select the various check boxes affecting my rank and stats, I wasn't able to get to this page before, so I'm guessing the glitch or something has been sorted?
Well I submitted my request now, so fingers crossed I can get my rank and stats back.