Poor after sales service from Grundig and Defy Service Agent

I purchased a brand new Grundig Refrigerator in 2021 and was very impressed with the quality and design of the product. Unfortunately, the main control display started to flash an error message recently, after which I contacted their Cape Town Service Center to attend to the issue as the fridge has a 5-year warranty and is therefore supposed to be covered. I learned that Grundig appliances are made by Defy in South Africa so therefore Defy is then supposed to sort the issue out under warranty. Unfortunately, the service that I received from the Defy Service Center was very poor, and have they STILL not attended to the matter after almost two weeks! I am very disappointed with their service and would not recommend them at all if that is the kind of after-sales service they have.