Terrible Service and Product

I purchased a Beko 4 plate gas stove and after installation the installer tested the stove and 2 plates are not working This is an out of box failure and when I called Defy who is the support for this brand, I was advised a technician will come out to assess and repair. This is a brand new stove. I dont want repairs done!!!! I haven't even used it. I purchased on 12 May via takealot, delivery 15 May and 17 May installation. I need this resolved asap and not within 2 to 3 working days. Seriously???