Plumstruck Walmart Did not deliver advertised product. Internet

I ordered a 6-pack of Snapware Storage Containers.  I paid for them.  When I received the product there was only one unit, not 6.  My Walmart/Plumstruck receipt clearly shows that a 6-pack of the item was ordered and paid for.  Plumstruck tried to tell me that I only ordered one of the item and that if I wanted 6 I would need to order 5 more.  The transaction was clearly false advertising and the companies failed to deliver the product ordered and paid for.  I have contacted both Plumstruck and Walmart.  Walmart says it's not their problem.  Plumstruck says, "Oh, we are sorry, we meant to advertise 1 item, not a 6-pack.