Item MISSING BUT PAID FOR

I ordered groceries online to be delivered to my elderly mother as I live in Jhb and she's in Cpt and I dont want her to go to shops (covid-19 affects the elderly). Paid for goods and it was delivered but a box of fish was missing. Tried calling the call centre but they just drop the line after holding for over 3 minutes (called twice), emailed but got automated response. This is not ok. I paid for food for my mother and even if its just one item missing, its still MISSING. Just wondering if thats some new scheme now- take something from each online purchase and think no one will complain but then you manage to subtely RIP THE PUBLIC OFF cos they PAY for missing items. Was my first time using online P&P and Im NOT HAPPY. Order number ***