Wall Mart Selling boxed food that is out of date Granite Falls, North Carolina

For the past 6 months I have bought an extra approximately $50 worth of boxed groceries from Wall Mart each time I bought groceries.  I have put them in a cupboard to save them in case of a food shortage.  This morning I went to use one box and noticed it was out of best to use by date.  

I pulled all the boxes out and checked them and found that over 2/3 of the boxes were out of date. Most were over a year or 2 out of date even though all were bought within the past 6 months.  There are about $280 worth of groceries out of date.  I called Wall Mart customer service and was informed they would take back groceries out of date only with a receipt no more than a couple of days after purchase.

I am stuck with 42 boxes of out of date food some costing $4.00 a box.  I went down to wall Mart this morning and checked some of the costlier items on the shelf, and found many of them out of code now on the shelf.