Check your laws in WVa. In Va there is a "lemon law" that makes the dealership take the vehicle back if the "handling issues" can be traced back to any alignment issue.
If you have any "out of alignment" issues then the dealership MUST correct them or take the car back. In VA they get 3 tries, with the first try your first visit with the "handling" complaint.
Assuming (big a$$-umption) your states laws mirror Virginia and you complain about the handling. They have to fix it or refund your money.
This course of action may NOT force them to take the car back, but it MAY force them to correct the handling issue.
For your back, try a roll of paper towels to see if more lumber support helps.
regards
mech