I apologize for taking this long to respond. I have successfully downgraded your account and processed the refund for the Cataclysm upgrade for you. Please feel free to email back with any other questions or concerns regarding your account.
Yay, I got my refund! For those that don't like the new changes you can get a refund as well. Just email email@example.com. You have to have purchased cata within the past 30 days, and you'll lose access to goblins/worgen and any character 81 and up. Worth it IMO. Send a message with your wallets and they will fix healing.