Dion Wired Canal Walk sold me a Used OLED TV at New TV Price without telling me.

I bought a 65" C8 LG OLED from Dion Wired in Canal Walk on Saturday 8th of June. I was ensured it was a sealed, new TV when I asked. When the TV was delivered on the same day the packaging was already opened. All the accessories had been used and the TV already had over 100 hours of use on it. This is unacceptable when spending R50k on a Television. Especially OLED technology because it's very fragile and can have permanent damage done if used as a demo unit. I called them and spoke to Irfaan and he informed me that the TV had in fact been used as a Demo or Display unit prior to my purchase. I then asked for something to be done about the matter which is when a sales manager named Burger Cronje sent me a mail saying he will replace the TV with a new one. I said thank you, please let me know about delivery and this is where we are now. It's been a week since I've heard from them and every time I call they say Burger isnt available and he will call me back. I'm still trying to get the new television but I'm stuck with a used product which I paid full price for and the sales team are not communicating in any way. This is not a cheap purchase and the after sales service is shocking.