Windshield problems of the 2007 Ford Fusion

I was driving on a east on a country road in the morning and the sun was in my eyes. I pushed the visor up against the windshield and it would not stay in place against the windshield. It returned to the vertical position, where it most obstructs visibility. Because of the position of the visor, I did not see a deer up ahead till the last minute, had to brake hard, and came very close to hitting the deer. These defective visors make driving extremely unsafe. I either have the sun in my eyes, or I have the visor severely obstructing my visibility.

As I approached a green traffic, the sun was in my eyes, so I moved the sun visor down so the sun was blocked but I could still see the traffic light. When I let go of it, it would not stay up against the windshield and hung straight down, blocking the traffic light. If it had turned red, I never would have know it. I had to drive with one had holding up the visor and one hand on the steering wheel. When I took my car in to the dealership I told them that the visor has never stayed up except against the car ceiling and we both looked at a 2008 model, which works fine. He said that they could order a new visor, but the replacement would be identical, so it wouldn't do any good. I feel that it is too dangerous to drive with one hand on the wheel and the other hand either blocking the sun or holding the visor up.