LG Neocheff Mi***ave Oven failures

My daughter bought an LG 39L Neocheff convection microwave oven from Makro Silver Lakes on August 23, 2020 (@ R6844.32). The oven worked well until Aug. 5, 2021, when it stopped heating. We took it to Makro Silver Lakes and my daughter requested that the microwave oven be replaced under the warranty. Makro however refused and repaired it on 31 August 2021. About 14 months later, on October 2, 2022, the microwave oven stopped working again and did not heat at all. We took it to Makro again, but we were told it was out of warranty and my daughter had to pay R1,257 for the repairs. After about two months, the microwave oven was repaired and returned on December 4, 2022. After less than 4 months of the second repair, on March 13, 2023, the same error was encountered again and it was taken back to Makro on 13 April 2023. I discussed the matter and our unhappiness with the manager at Makro Silver Lakes, Mr Mashilo Sekgale. After three similar errors it is evident that the microwave oven is not reliable. It fails on a regular basis, and we feel that the oven needs to be replaced, as originally requested during the warranty. The oven is inherently unreliable, and my daughter cannot continue to pay for repairs on a regular basis for faults that have already began during the warranty period. We also have no confidence that the oven will be successfully repaired after three similar failures. Since 13 April 2023 I have not received any feedback from Makro to date (12 May 2023).