Dishwasher Rack Rails are Rusting!!

I purchased a Whirlpool Dishwasher ~ Gold Series WDF730PAYT3 from Lowe's on 10/2/2012 based on the fact that they promoted "never rust" dishwasher racks.  This model has a plastic tub.  I paid $ 645.08 (which included $ 134.00 for the labor to install the dishwasher. I also purchased the 2 year extended warranty for $ 219.00 and just renewed for 2016 at an additional $ 56.39.  So for a total of $ 920.47 that I spend on this POS, I now have rusting upper dishwasher rails that have rusted in a short period of time.  When I called the warranty company, they said that this was considered a "cosmetic" issue and that "rust" was not covered!  What kind of bull is this?  I am so fed up with this company that I want to join any other consumers that have been ripped off by Whirlpool.  They need to do the right thing and honor their Made In USA products and replace any stainless steel that is rusting in such a short period of time.  What kind of inferior materials are they using to dupe consumers they are purchasing a product that is supposed to last?  Not rust out in under 3 years.  I am a pissed consumer, are you?