Faulty Bosch Series 6 Oven and Extremely Frustrating Support Process

We purchased a Bosch Series 6 built-in oven expecting the quality and reliability associated with the Bosch brand, but unfortunately our experience has been extremely disappointing. From the beginning, the oven baked inconsistently. The “3D Hotair” function did not bake evenly despite Bosch specifically advertising the oven as being able to “bake evenly on up to 3 levels.” Conventional mode performed somewhat better, but the oven still ran significantly hotter than expected. We consistently had to bake 15–20°C lower than standard recipe temperatures, and when baking multiple batches (cupcakes, scones, tart shells etc.), each subsequent batch would overbake unless the temperature was reduced further. We also experienced: Progressive overheating between batches Uneven browning in fan mode Clock drift requiring regular correction Interior enamel/coating damage and scratching within the first month of normal household use using the supp**** accessories Multiple technician visits were arranged. Initially we were repeatedly told the oven was “within specification,” despite the inconsistent baking results and the clear contradiction between the actual fan performance and Bosch’s 3D Hotair advertising. At one stage, the installation itself was blamed, despite the same cavity previously housing multiple other 60cm built-in ovens without issue. We then reviewed Bosch’s own installation requirements and compared them to the actual installation. After extensive testing and back-and-forth communication, Bosch eventually confirmed in writing that the unit is faulty and escalated the matter to Head Office. We were advised on 7 May that feedback would be provided within 2–3 business days regarding replacement or further action. It is now 17 May and we still have no update or resolution. The entire process has been incredibly time-consuming and frustrating, especially considering this is a premium appliance. At this stage, I am extremely disappointed both in the product quality and in how long it has taken to resolve the matter.