Disgusted in the service

I am so disappointed in Defy. We bought a gas stove in April 2022. Back plate stopped working in August 2022 and they came to fix in on the 12 August 2022. They left and said they ordering a part and to date no part was received. We have sent an email on the 25/10/2022 as advised by defy but to date no response. We can only use 2 of the plates when we have loadshedding and the one plate is very slow. I am disgusted in your service!!!!!