I have sent my protest email to
[email protected], the GP email address, and Customer Relations.
As someone who has taken part in the "Trial Elite" program this year, I feel that by changing benefits half way through the year the airline has committed fraud. I never would have paid the fee to upgrade to Gold if the announced changes were in place. In fact, I would have switched to another carrier. There's no excuse for pulling something like this.
Edit: Hrmm... the anthony.mule address does not seem to exist. This seemed to be the most relevant from the list posted earlier. I'll try executive.office instead.