Replace Faulty Stove

On 24/11/2021 I bought a Stove [DCB866E DEFY Box Set Bundle (DBO486E & DHD406A)] for my in-laws, out of the Box 1 of the Hob plates was not working, I logged a repair with Makro and they logged the issue with Defy and they came to repair the Hob. Again in December 2022, all 4 plates on the Hob no longer work, I logged another Repair call with Makro, they again Escalated to Defy, Defy Sent a Technician, the Technician came and he said the Hob needs to be repaired at a cost of +/- R1500 and just left. How can a stove just stop working within 13 months and they require +/- R1500 for repairs while it is still under warrantee. This is just ************** because my In-laws stay in a township, my mothers neighbor in the Suburbs in an Estate has the same Stove and it stopped working the same way and in roughly the same time period and Defy came and replaced the whole Stove and Oven and yet my In-laws are treated differently because they stay in a township. I want that stove to be re-placed because its been faulty from new.