No replacement for faulty TV unit

Hi,

I have bought a Hisense65'' UHD Smarts TV with HDR and Digital Tuner on 5th July 2020, but get the whole time this error (Netflix error ui-800-3)when switching to Netflix. It doesn't even give me an option to sign in on Netflix.

The Hisense Technician has come to my place twice now without fixing the TV. They said that they would submit a report to get the TV replaced.

The TV was collected on Friday 23rd October.(RRN-8546-60e2). I have been struggling to get a replacement since 10th July 2020. Please see the history regarding this purchase on order no ***7

Why is it so difficult to get a replacement or my money back.

Kind Regards, Johan