Pick n Pay not delivering and not refunding

After a delivery from Pick n Pay I noticed 2 items to the value of around R220 were not delivered. I immediately called the customer service but since the delivery guy did not make a note of it, I was refused any assistance. This is not the first time it happened (it happens almost every single time). The lady that works for me is illiterate so it is not possible for her to determine if everything on the list has been delivered. Even though I understand that since she signed the invoice thus accepting the delivery, Pick n Pay should take some responsibility that someone down the line is actually *****ing!!! Every time I pay for items that are not delivered, where does it go??? On top of it all, the customer service is the worst I've encountered anywhere ever. Useless and unfriendly.