Selling customers old food!!! EWE!!!

WELL... I bought a ham, cheese and tomato sandwich at pick 'n pay. There is not really much to say or explain about this, besides the fact that managers and owners are not checking to see if their staff is doing their job. Rather they would sell food that was so off and sour that it had made me sick for 3 days. The ingredients on the sandwich were old and the sticker was not pass the expiration or sell by date. Does this mean that Pick 'n Pay is using old cutoff products to make their sandwiches. I do not buy food there anymore.