Furious Customer not getting good service - Faulty Hob

good day,I bought an oven and hob at Zevenwach Game September 2017. a day before christmas last year my defy hob have been giving me problems. Christmas i was without plates and had to make food in the oven as well as asking family to bring food. my pc board were replaced in January 2019 and since then it was replaced about 3 times again. end of February 2019 it again gave me problems and a senior technician Joseph from Defy were send out to do an analysis which he analysed that the lead might be faulty or it's the pc board again. he then replaced a power lead he had in his bag with the one i had and still it did not work but he was very determined that the fault was on my side but i again told him that if his power lead does not fix the hob problem what is the way forward. He mentioned that he will take the hob to Defy office warehouse to be checked out and will give feedback the monday. Monday came and no one gave me feedback and when i smst him he (Joseph) called me the evening and said that Defy was supposed to come in contact with me to inform me what the outcome but he will call me back in half an hour (that was 20h30) but that night he did no call, again empty promises because this was the same issue i had with Joseph the first time he was send out to my house. I tried calling him and smst him the following day but no answer. Then i called the previous technician who came to replace the previous pc boards and informed him of the issue i have. he gave me contact details for Morgan, one of the managers at Defy - ********** 000 (had to call this number to speak to Morgan) - Apology, had to call Morgan before he came out to my house. In other words, Joseph only came to my house after i took it up with management. As mentioned, Joseph was booked to deliver my hob but that did not take place on 25/2/19. Same night when he said he will call me back. 26th he delivered and my wife were home and said mentioned all sorts of things to my wife which was totally different to what was mentioned to me and he said to her that he will return later to replace the pc board but that never transpired. When i got home iv ask my wife if Joseph delivered the pc board as mentioned but nothing. I've tried thereafter to come in contact with Joseph but he did not pick up his phone or rep**** to his sms's. I had to call the previous technician and he told me that it's totally out of my hands but gave me advise again to call management. I called Morgan after i struggled to come in contact with Joseph and could not get through to Morgan. Then i ask the receptionist to refer me to another manager whom i can deal with and she referred me to George (direct line ********** 126) and he listened to my argument and said he will sort it out. I thought everything will be sorted, but then i the struggle came back again and now the senior technician said that it could be that my isolator is faulty and what causes the pc board to blow. I then went as far to replace the switch but George want me to take the hob to Game, they replace with new one and if the hob is still faulty and the switch is the problem, then they would not come out again to replace the hob but i told George that arrangement is a disgrace because then Defy will win. that happened almost 3 weeks + back. He then told me again to take the hob to game, game must cal him and he will give authorisation for the exchange to Game. then i visit Game at Zevenwacht mall and spoke to Innocent and he informed me that it's not the way it's done, they will call Defy to log a complaint, then when they receive the authorisation the warehouse will come directly t me to replace the hob. 1 of March i went to follow up at Game of the situation and they informed me that they are still awaiting feedback from Defy. I left there so angry because iv been without a hob since before the 22 of Feb 2019. I immediately called the previous technician and even he was boggled with my feedback because he thought it was sorted already. He call George that day and again George said the same thing - remove the hob, take it to game, game must call him, he give authorization and they exchange. Today (2/4/19) my wife who has the flu, supposed to be resting ask me if she can take the hob to Game, took the hob and when she came there Game called Defy and George again said differently - we don't need to bring hob to Game (which my wife carried and that thing is heavy) and that they will sort it out within the next 3-4 days. I am so so furious because they have not only been messing us around but we've drove out petrol to go to game, had to get our own qualified technician to remove which was a tough one and my wife had to get out of a sick bed to take the hob to them. I am furious!! Then game informed her that they do not have stock and if Defy can't assist they will refund us with the hob's money. I don't only want the hob to be replaced, I feel like just getting a complete new unit from them and not only the hob. Please help!