Steering Wheel Vibrate problems of the 2011 Mercury Mariner

While driving on i90, recently noticed noise in steering column which has gotten progressively worse and steering wheel now shakes. Taken to Ford dealer was told it was atorque angle steering sensor. Fix about $500 unless the steering column is broken! fix then 1530. How does a steering column break? recall 14s05 for steering problem. Supposedly if this was fixed Ford is released from any recall dealing with steering if it has been replaced. Apparently Ford omitted this info from the public just wondered if I have any recourse to resolve this. Ford dealer says no recall. Ford company says this is not under recall as I had prior recall taken care of. There are numerous other complaints regarding this vehicle and the same exact problem with the exact same outcome. I have had other problems with Ford products resulting in hospitalization and haven't done anythingg I can not allow this one to go unnoticed. Thank you.