They just don't care!

Just over a year ago I renovated my kitchen and went to Hirsch Umhlanga to replace my old appliances. The sales lady convinced me to buy the Whirlpool 75cm Gas/Electric Hob AKT 759/IX WITH EXTENDED WARANTY to replace my ancient Defy gas and electric hob (that worked like a dream). Once installed, I found the electric plate could barely simmer as it didn't get very hot. I contacted Hirsch, who sent a Whirlpool technician - job WJ161859. He switched the plate on and held his hand over it and said "It's working perfectly. It must be your electricity supply that is faulty." and left. I had my kitchen rewired and found the plate still didn't get hot enough to cook on so I called Hirsch, got the same technician who said: "Sorry, this model is just like that." and left (job 25515). I called the lady who sold it to me and she said that was just too bad and I would have to sell the stove on Gumtree. Yes, her exact words! Never mind the extended warranty and the fact that the stove is brand new, not ever used at all. I then went to Hirsch, Springfield and spoke to the sales manager. She said she would ask Whirlpool to consider selling me a different hob, though I would have to pay a handling fee and excess. She sent the email while I stood there and promised me that Whirlpool would contact me within 48 hours. That never happened. I have phoned the Whirlpool Customer Care Line dozens of times over the last month and spoken to Janelle, Carmelita, Zinhle and others who have all promised me their technician will contact me within 24 hours every time I call. I am still waiting and in a few months the original warranty will have expired and they will have a valid reason to ignore me. Hirsch, meanwhile, have washed their hands and passed the problem to Whirlpool. So much for the extended warranty.