i took a call from this number. it IS walmart discover card. i was very nervous about giving personal info, but i called walmart credit at 877 294 7880 and after an interminable automated system i did talk to a rep and they said the call was legit and that the person had made the updates to my account and made notes explaining the problems. so you can relax about it.
I had fraud on my card and apparently they didn't believe me and now ge money is calling me several times per day. I want to dispute the fraud charges on my account but it is to the point that I will just pay to get them out of my life. Any advice.....