appliancezone.com Sent defective product, now a run-a-round, Internet

I ordered a whirlpool dehumidifier pump (WPL 8212501) and received it June 25th, I installed the pump and witnessed it pump once - seemed ok.  Checked on it a few hours later and found water all over my basement.  The pump was running - but not removing water.  I checked the hose for kinks, etc...no issues there.  So, in short, the pump is no good.  I contacted appliancezone.com to inform them that the pump they sent was no good. 

They responded by asking for a Model and Serial#, I informed them that the pump only had a model and Eng # on it.  They responded with wanting the model and serial # of the dehumidifier that I was using it with.  I explained it was irrelevant since the pump is self contained and made to work with multiple items - they will go no further to help me.  So I put in a claim with PayPal.  Hope it works out for me.  Wish I saw these reports prior to my purchase.