Complaint about store manager's arrogance and the long wait to get my refund

On Thursday 4 January 2024 I and my wife (Amanda Tshikovhi) bought a JVC 40Inch Smart TV at Russells furniture shop situated at Landdros Mare street Polokwane, Limpopo assisted by Morris. The TV had poor quality visuals and I immediately contacted the sales person (Morris) who promised to come assist with settings on Saturday 6 January 2024, which he did not come and today 8 Jan 2024 I returned the TV hoping that they will recommend another product and came across a very arrogant and rude person by the name of Amos Morifi whom I was told is the branch manager, he told me where to get off in front of other customers and told me that I am not the first nor the last customer to come to buy at their shop so he does not care whether I cancel the deal or not, his customer service is very poor. I contacted the Head Office via their Facebook page regarding my refund and now they tell me after completing the refund documents I should wait for 30 days to receive my refund, I don't understand why I should wait so many days to receive my refund and it means I wont be able to watch news or any of my favorite programmes since I don't have another TV in the house