Need help 2021 NX350AWD

[NX350AW]

Hi

I am new to this group i own two Lexus 2014 RX350 and recently purchased 2021 NX350AWD 

and having problem with my 2021 NX350 rearview camera

try to get the problem solve with Lexus in past 4 months and still have no clear answer from Lexus if they are going to fix it.

Rearview camera is defected not functioning when put on reverse and screen is blank which is part of Lexus safety future when backup 

i don't know where to turn after four months try to get it fix but Lexus keep telling that camera part

67B0F6021 Camera Assy is in back order and every time i call they keep saying that still backorder but continue promising  new ETA of the camera,

if anyone can direct me to better way to get Lexus attention and looking to my issued i greatly appreciate the reply and input.