have not been able to connect , says the requested URL/search/search-ng.do was not found {cent os} server at walmart.com port 80

I have not been able to get into the walmart.com online shopping web page for before thanksgiving. Comes up either error 404 or the requested URL/search/search-ng.do was not found {cent os server at www.walmart.com port 80. I at times, if lucky, can bring up the walmart page, but when I click to try to shop or check out my cart, than all of above happens when I go to the walmart.com page. I am trying to xmas shop, I can get amazon, ebay, shopko etc,  but not the walmart. I even changed- at least I think I just changed my password thinking it would let me in to it, but NO!  The account name is my husband james, email is lauriel.com@gmail.com  new password changed to jessejames and my credit card used is in my name Laurie l. schumann and it is a mastercard.  my address Laurie L. Schumann  W8881 Gossfeld Lane, BeaverDam Wi. 53916  phone # 920-219-4145