Pathetic customer service

On Monday 12 May 2025 I made a online purchase.I arranged with the courier guy for collection. Tuesday I saw that the collection attempt failed, so I phoned the branch. My phone number was taken, with the promise that they will come back to me. No phone call received. Later the day I checked with the courier guy, collection was done. Wednesday I received my order. The incorrect item was send to me, invoice included for another customer. I phoned the branch and explained, and even offered to pay for the incorrect item. I was requested to forward my address, in order for them to send the correct items I ordered. This morning I again phoned the branch to follow up. I was informed that the order has been send. I requested a waybill nr, so that I can trace my order. No waybill number received, no communication from them. I lodged a complain via their online customer care. No reply, nothing.