Replacement Unit

I purchased my Samsung stove in April 2014 and installed it in June 2014. I have had endless problems with it. The technician has come out 4 times now. The first time he came out, he said the unit was not installed properly and he re-installed it (therefore the unit was now installed correctly). He also said the fuse for the oven blew and replaced it. A month later it stopped working again and it was the same problem. The fuse was replaced again. On 3rd Feb 2015, the stove kept tripping the lights so a technician came out again. On 13th Feb, the same problem again. This time around the technician says that we need to call our electrician because the there is a problem with the wiring in the house, however, the first time he came, he REINSTALLED the unit! The electrician was called and there is nothing wrong with the wiring and I had to fit the electrician's call out fee!!! Now, Samsung does not want to replace the unit because the technician did not say it was not fixable?? So where should I cook every day? Who is going to re-imburse me for all the takeaways bought because of Samsung?