Faulty Appliances!!!

Purchased an LG 55inch uhd tv on 18/06/2023. Shortly after purchase, we started occasionally experiencing sound issues with the tv. Raised our concern on 14/08/2023. They gave us contact details for a person from LG named Michael and said we should call him about the issue. They did NOT log the complaint or provide a reference number. Michael said the sound adjusts according to the environment and type of TV watching done due to the tvs AI functionality and that the sound will normalize. The sound issue continued intermittently. Then a few months later, the tv screen went off and flickers, and continues to do so frequently. Contacted Hirsch's again. They sent an LG technician who said the tv is factory faulted due to a faulty motherboard which is causing all these issues. I reported that the tvs internet doesn't work most of the time as well. He said all that he can offer is a repair??! I first reported issues with the sound which was a sign that the tv had a problem well within their 6 month policy. It was just a few weeks after purchase. They didn't log the complaint, or provide a reference number for any of the complaints up until now. They then asked if a senior technician (named Bonga) can cone assess the tv. The senior technician is not interested in coming through. They made 4 appointments and did NOT pitch up. I took time out my work day and they did not bother to call or cancel, nor did HIRCHS bother to notify me about LG not arriving. Hirsch's are refusing to give me a refund for this non functioning TV. They sold me a factory faulted tv which LG supp**** to them. They as the retailer should be taking it up with Lg and refund me as I did not go into Hirsch's looking to purchase a factory faulted tv!!! I asked the LG technician to escalate my complaint and he told me to do it myself. What kind of customer service is this?? The owner of Hirsch's often does seminars and talks about good business and wellness, yet they don't seem to care about selling non functioning appliances to innocent customers. I made contact with her and have yet to receive feedback. My 1st complaint falls well within their 6 month policy for a refund yet they refuse to honour their own policy. Disgusting and *********!!! If they received a factory faulted item within their stock from the supplier LG, IT IS NOT THE CUSTOMER'S FAULT. THE TV IS "FACTORY FAULTED" meaning that somewhere in the line of production, a fault occurred during PRODUCTION, and that is NOT THE CUSTOMERS FAULT!!! I WANT MY REFUND!!!!