Shocking service

Bought a freezer and in 2 month we noticed it is not switch off, this means even if it reaches the right temperature it continues to run. I called the outlet that I purchased it from and they called defy to send some one to have a look at it. Defy doesn't contact me to make arrangements to be at home. They just pop up and cancels the ticket cause no one was at home. Then I called the outlet again to log another ticket the technician being very unprofessional says he will come at 11am but on come at 5pm.He open the side panel and says nothing is wrong, then I showed him a burnt part and then he tell me that the thermostat needs to be replace.he said will come the next day to replace it. Still doest stick to agreed time. When he goes back to defy he tells them that there is nothing wrong. This as been going on for over a month. Then I speak to a guy buy the name of Duddley. He told me to send a picture of the invoice and he will get the freezer swopped out. Still nothing. Called the outlet again and the lady said Defy says there is nothing wrong with the freezer. The freezer is only 2month old and parts are burning in it. It's a safety issues and defy refuses to do anything about it. This is the only Defy product I have and it will surely be the last. I can't stand business that don't care about the customers.