AEG and poor after sales service

I bought an AEG 6 plate gas stove with an electric oven from Hirsch in Fourways and was told that this stove has a three month warranty. We installed the stove about 5 months after purchasing only to find that 1 plate is working. We reported this to Hirsch and 2 weeks later a technician was sent to attend to the stove after numerous calls. The technician attended to the stove but failed to repair it claiming that he requires new parts. Two weeks after he left, we contacted Hirsch to follow up. We got a call a week later from AEG confirming that the spares are available and a Technician will attend to the stove. Two weeks later and no technician arrived. We are forced to work with 1 plate. Bottom line is the sale was made and there is no longer value in the customer who is now seen as a nuisance. After another week, we requested that Hirsch replace the unit which was agreed to, but, at our cost to now disconnect the old unit and connect the new unit. Unfortunately, we require the stove and are desperate, so AEG wins again