Pick n Pay - Undelivered food items

I ordered food for delivery through PnP delivery app, they delivered the food items and the driver left as i was packing and checking the slip i realise that there were missing items. i called their call centre and i was give a reference number
The following day I contacted them as I needed my eggs and bacon, I had to hold for an hour on their call centre no one picks up. as early as 8am you are told they are experiancing a high call volume.