Do you have any pictures? If the seats look HORRIBLE as well as have little support, your dealer may be "forced" to do something. I accidently damaged my leather using the wrong cleaners... A few months later i have brand new leather at no charge to me
I took the car to the dealer to show them what it looked like. I "may" have made the seats look worse than they really were...

(a bit of acetone and 100 grit sandpaper really works...) I told the service manager i took the car to an upholstery shop who stated the leather was damaged using chemicals. I bought the car CPO a few years ago so i made it seem it wasn't me who caused the damage. Ask them why YOU should have to pay when it was someone else's mistake... It should have been fixed before it was sold.
He stated that it was just "normal wear" (clearly wasn't)
After 5 more minutes of arguing, i asked, "Have you ever seen this before on such a new vehicle? Is it a known problem?"
He responded with, "No it's the first time."
I now stated, "but a few minutes ago you said it was normal wear! If you've never seen this before, how can it be normal?"
Catch them in lies, call corporate in CA a few times, and never let it go. You will get what you want