Walmart Bait and switch tactics Nationwide

I purchased a computer, cord and monitor online from Walmart and received a confirmation on the order.

When I recieved the shipping confirmation, they had canceled the monitor stating, "The item listed below was canceled due to a system error that kept us from processing the the order.  We have just fixed the issue, so please feel free to place your order again."

When I went back to the Walmart site to reorder the same monitor, the price had been raised from the original $89.99 that was confirmed to $110.00.

 This is not the first time Walmart has done this to my family.  The first time, we reordered the item.  This time I refuse to deal with them.

 Have others had this problem with Walmart?