Never ever buy staples extended warranties

i bought finddrive400 pro form staples 10/27/2006 for $399.99puls $44.99 for one year extended warranties.It was working fine but some time may 2008 it gives me problem,then i called and send for repaire nad one day when i came form work i saw the ups box out side the house,it was littlebit wait but when i opend and try it works fine i used one week then problems comes back then i called back they told me send back to repair again i send back again and i recived yesterday but it is not repaired then this morrinning i called again then they told me it is water damage there for warranties does not cover.If it was water damage then why they did not told me when i first time send and i always keep my gps inside the glove box,how did get water inside the glove box.