Hirsch’s and Hisense disappointment

I have bought a Hisense TV it has been report for technical problems since then and I have several times raised concern to exchange it. Now that it is out of warranty they are telling me that it is impossible to assist. But this TV has been a problem to me ever since the purchase. Please sequence of events below Product Details:

POP (Proof of Purchase): 08/06/2020 Model: 65A6501EX Service History:

July 2021 (Job #***): Factory reset performed. September 2023 (Job #***): Mainboard replaced. November 2023 (Job #***): Supplier claim I cancelled this job card