Latently defective oven and no help/response from Samsung

I purchased an oven in Nov 2018. 9 months later the decals/numbers on the panel had rubbed off. The panel was replaced through Hirsches service team (sept 2019). July 2020 numbers rubbed off again, big fight with Samsung who alleged I had used chemicals to clean the oven panel, which is not the case and did not respond to my requests for lab tests on the panel to confirm their allegations. Also alleged the panel is cosmetic and not subject to warranty, WITHOUT THE DECALS YOU CANNOT SEE OVEN SETTING OR TEMPERATURE RENDERING OVEN USELSS! They refused to replace this oven when I first had this problem despite this clearly being a latent defect and could not confirm that they would treat the replacement panel to ensure this wouldn’t happen again. July 2021 this has happened again. They will not engage with me and want to make me pay R1,2k presumably ex Vat for a new panel. So I must pay R1,2k each year for a defective product just to use my oven? No response from any of the Samsung channels.