I bought a Walmart MasterCard last night. I went on the website and I put in the card info in and it says invalid. So I did it about 5 more times and said the samething. So I call the # and i put my card info and once more. Invalid. And then I call Walmart I bought it. They said I would have to keep trying until it works. Why is there no email customer service or a person you can talk to. This is very aggravating.