Originally Posted by
Often1
Wrong. UA will simply laugh at you. The rule applies only to "tickets" and this was not ticketed in F. As it turns out, there isn't even F on the aircraft. OP has been offered the upgraded cabin at the price difference, but doesn't have to accept it.
OP can file w. DOT, but he'll still be sitting in a coach seat on his flight, UA will fight this issue and it will win and that's only if DOT pursues it.
Well, you're certainly entitled to your opinion, even if its totally based on speculation. But its usually less deceptive when you acknowledge that nothing in your post is based on fact.