Defy repairs

I bought a defy stove from Masons in Benoni in February 2020 with a 2 year warranty. On 3 June 2021 I logged a fault at defy for the fan that makes a noise and the oven which does not bake even. On 3 occasions technicians came out to establish the problem. Each one promise to order the necessary spares. Nobody ever phoned to keep us updated. I phoned on numerous occasions. Everyone is always "in a meeting " and "will phone me back", which of course never happens. I feel upset, let down and completely ignored. Surely, if I pay almost R8000 for a stove with a 2 year warranty which only works for little more than a year, one can expect better service? How can this problem get solved?