No service from Defy

We purchased a Defy stove from Game Greenacres in 2017 with an extended guarantee to 2022. The stove has already been replaced once due to numerous defects. The stove has again broken. A technician was sent out to fix the stove plate and the 1 element. 1 Day later the entire oven and warmer drawer stopped working. It has now been 2 weeks and nothing has been done. We have contacted Game telephonically numerous times and have also been to their store about 10 times. The managers phone Defy and get no help. This is pathetic service. Between Game Greenacres and Defy, this issue needs to be resolved immediately as this is pathetic service. The managers at Game keep blaming the Defy for the delay. We need this fixed now!!!!