I purchased a set of three $20 Steam gift cards online from Walmart and had them delivered to my grandson. None of the three gift cards work. I contacted Walmart and they said I should have received an activation code within 48 hours of delivery. If I wasn't sent the activation codes then I needed to contact the manufacturer of the cards. The cards were delivered on May 27, 2021. Today is June 6, 2021 and I still have not received the activation codes. What information do you need so that the activation codes can be sent? I have the receipt from Walmart and/or the card numbers. User's recommendation: Avoid buying these online.