Other Fuel System Tank Filling/charging problems of the 2008 Ford Fusion

Every time the vehicle gets gas, it doesn't even need to be a fill up, the entire passenger compartment is consumed with gas fumes. We took it to Ford dealers and they say there is no problem you're probably just over filling it when you get gas or they are spilling gas but that is not the issue at all, I'm positive about it. We contacted Ford corporate and they sent us to another dealer who said the same thing. I think there may be a problem which would require removal of the gas tank and they just don't want to do it. Has there been any safety recalls about this? this car is my mothers and I don't know how she hasn't passed out while driving from the fumes, it really is terrible and we have no answers. I'm a former mechanic from years and years ago and know there is a problem here, maybe a vacuum hose or fitting or the gas tank itself, I see online other years had a similar problem above the gas tank with a plastic fitting cracking. She has been dealing with this problem since she got this car two or three years ago. She did have another car hit her from behind on the drivers side bumper when parked and it was repaired at a body shop but the car was taken to the dealers after that time.