Homemark/Milex policy on default items

I bought a demo Milex airfryer on Tuesday the 16 March at Homemark Fourways. On Thursday 18 March I took the item out of the box and tried to fry chips for dinner. After several attempts I realised the airfryer was just blowing air and not heating/cooking. So disappointed, I now have to wait 2-3 weeks to have it repaired - as per Homemark policy. If I was able to get a refund I definitely wouldn't purchase from them again due to policy.