Walmart Product Replacement Plan - Sucks! Don't waste your time and money!

Bought a vacuum on walmart.com, and purchase the 2 year Product Replacement Plan.  Few months down the line, the vacuum stops working. and I recall that I purchase a replacement plan.  Well I'm on going on almost one month and still no replacement.  I've called four times and they keep getting the run around.  I purchased the vacuum online and they want me to send them a receipt through mail.  I wonder why is that.  I could just forward them my receipt through email.  I did buy this shit online.  But they claim they never received the mailed receipt and thus I don't get refund.  WTF!!