Whirlpool Oven Hob - Inferior Quality

Dear sir/madam

I purchased a Whirlpool Oven Hob from Makro Woodmead in early June 2019. Over and above the purchase price for the Whirlpool oven hob, I also bought an extended warranty for 2 years at an additional cost of R430.00 as I thought this may be the right thing to do. It was not even 1 month when I started having problems with the Whirpool oven, whereby the plates just stopped working after a period of time, to which I contacted Whirpool and informed them of my problems. A service agent from Whirpool was dispatched to inspect and I was requested to have it replaced by Makro, to which I did. The same problem happened within the next month or so and followed the same process and had a new oven replaced again. I still seem to have the same problem and I am certainly not happy with the Whirlpool product as I spent a lot of money for a product that keeps breaking down and cant be used to its maximum capability. This is unacceptable and I would like Whirlpool to take accountability for their inferior products. I have reached out Whirlpool but I don't seem to have any success.