Does Wal-Mart give out a slip of paper that the card got activated like Target does? It sounds as if Wal-Mart did not scan the card to activate it.
Chat with a PlayStation Specialist
Mon - Sun, 5:00AM - Midnight Pacific
Consumer Services and Technical Support____ 1-800-345-7669
Mon - Fri, 8:00AM - 8:00PM Pacific
Sat, 7:00AM - 6:00PM Pacific
Playstation Network Accounts and Billing Support____1-877-971-7669
Playstation Forums Support MVP. I do not work for Sony. Just a helpful gamer.
Scanning the card is not enough. It is a gift card, and like almost all gift cards it has no value until it is activated. The cashier has to slide the card through the credit card slot on the point-of-sale terminal, and then complete the card activation screen. If the cashier just scans the bar code on the card, the correct price will come up, but the card will be worthless.