LG arx 10 not "quite" as bad as service but still terrible.

I purchased a LG ARX 10 in November 2019 this device has a 2 year warranty. First problem came in December 2020 with no sound output from device except a ticking sound and then it displays S-PROTECTION. I took it to their repair center in January 2021 and received it back on 26th January. Works perfectly... Until 25 February exactly the same problem and symptoms. Took it back to same repair center and after three days of testing the unit they notified me that there is nothing wrong with it. I went and collected it on Friday and by the very next Wednesday yet again! Same problem. This time I recorded a video showing the exact time and date as well as symptoms and error. This video evidence was sent to LG as well as the repair center. Fast forward to 31 March. Amos the apparent manager at LG tells me that he is personally testing the unit and it is fine thus far and not seemingly faulty. I tried to explain to him that this is exactly why the unit was sent to them and not the repair center because they said it was fine and then in fact was not hence the video evidence sent to them showing the problem. After a while when I was finally allowed to speak his reply to my question what happens when you send it back to me and it is still faulty or becomes faulty yet again after a few days his reply is a resounding I DON'T KNOW.