Grassology Product ,Grass Seed, did not grow. Bought at Wal Mart Internet

I bought two bags of Grassology grass seed Guaranteed to grow and it didn't grow at all.  No change in my lawn after over 3 weeks, nothing.   Now i notice there is no way to contact customer service.  When you call theirnumber it's to order more bags,  there is no option to speak to customer service about complaints about the product.   I'm going back to Wal mart where I bought it for $20 a bag to get my money back.  The seed must have been dead or something,  because it absoutly did not grow.