Have you tried going over the dealerships head.Start by going to Fords customer services dept. They have one
http://ford.ca/app/fo/en/customer_support.do
I will also explain that when you are dealing with them that if the frst person says "NO" ask for their supervisor..most importantly stay calm, if you get hot and start to yell and scream at them you are hooped for sure.
Had a buddy who was a service manager for a dealership and I asked him one time "what would it take to void somebodies wty?" His response was " It depends on how big of a jerk they are". Wish you luck in your quest.