I am banishing Walmart

I know, you don't believe me but I'm annoyed with Walmart. I've become totally addicted to the TV show, How I Met Your Mother. So we've been renting the episodes from Netflix. I found season 4 at Walmart for $20 and it said it was available online and in stores. So I told R let's go get it and watch it all weekend. I called all three stores and none of them had it according to whoever answered the phone. Why not? It just came out 3 months ago so why would they all be gone? So Walmart is banished to me, at least till the weekend.