Paid for goods I did not receive!!

I ordered on the 25 March 2022. Delivery should 've been after 4pm but it was delivered before that time and my kids accepted the order. When I got home I discover incorrect item delivered. I logged a request and they asked me for proof. I took a pic and discovered that 1x 6pack milk was short delivered. I queried it and a request I was informed a request was logged it's been a week and everyday I log a request and til today no response from Pick n Pay. I have Cctv camera's at home and even send them a recording showing them what my kids received. I paid for milk and to date no response. No call emai or even a refund. This is so ********* lThis is not the 1st time once cleaning detergents leaked and driver took it back for pick n pay to refund and I never receive the refund.