NHTSA Complaint #11474295 — 2020 HYUNDAI PALISADE

I have only had this car for 1.5 years and about 6months ago I keep hearing a thump from rear suspension then the alignment started going off pulling to the right. Take it to tire kingdom to be aligned and they told me the shocks are leaking. Go to dealer and they took one week to say one shock is bad but part will take another week to get here I tried to get them to change both as the tsb I found 22-ss-001h but they refuse and will only change one. How can I get them to follow this tsb? As at the moment the car dose not feel safe to drive and I shoul not be responsible for this issue of changing both shocks properly. Dealers should not be able to fight things like this as they avoiusly know thers issues but they won't honor it. Anything you can do to help would be greatly appreciated, otherwise I may have to get lawyers involved. Thank you for you time.