Rear Suspension Springs problems of the 2014 Hyundai Santa Fe

Drove new 2014 Santa Fe sport 2. 0t for the first time on the highway after buying it 3 days earlier. The vehicle would not maintain a straight path while driving at highway speed. Sf required continuous correction at a varying degree. It is not only that the vehicle wonders, but it does so mildly and aggressively. The vehicle tends to sway and rock all while trying to correct for the continuous wondering. It's a very odd sensation that occurs, just when you think you might go straight for a bit the vehicle will dart to one side and it has no rhythm or reason. Sometimes left sometimes right and the road crown plays no part in the direction. Dealer aligned all 4 wheels twice. Added toe in and camber to the rear. Also, replaced rear springs and shocks. Turns out one of the springs was shorter than the other by 1/4" causing the suspension to be unbalanced. This repair helped for some of the unexplained rocking but now that it is fixed the whole steering issue has been exacerbated. I don't feel safe in the vehicle and intend on selling it. Currently, it has 11k miles. I logged another complaint with Hyundai customer service today too. The fact that potential buyers rarely get to drive the new car for more than 7-10 miles and at speeds rarely above city is a disservice. If Hyundai knows this problem exists and government oversight knows, than it is deceitful and dishonest. Lastly, this vehicle behaves in the same manner as one with worn out ball joints that would not pass a state safety inspection. Yet these Santa Fes are still being sold. It's a wolf in sheep's clothing. Buyer beware!.