BE WARY A T PICK N PAY CRESTA

My complaint is against Pick n Pay Cresta for their inefficiency .Recently on two occasions I purchased at their cigarette counter items and through an oversight on my part I left the goods behind. Only when I got home did I realise that I did not bring the paid items home. When phoning the store I was told that the goods were there and I could come and collect it. My complaint is: as soon as I walked away after paying, if I left the goods behind, couldn't the cashier call me back and give me my items? The last time this happened I was the only customer there, so its not like they were too busy to see that I didn't take my purchases. For me its a major inconvenience, driving 20kms home , not finding what I paid for, checking all my bags, the car and stressing. Then going back to the store to collect my things. My argument is if I forgot about the item, what happens to it? I am not casting aspersions on Pick n Pay but I am very suspicious of them. We produce a Shoppers card everytime we purchase, so they can check whose items are left behind but they didn't contact me when I left my goods behind. I feel that shoppers should check that you receive all your items when paying because it is unlikely you will get it back from Pick n Pay. I think they purposefully do this so that they can get free goods.