Makro Alberton and AEG have provided extremely bad service

My husband and I purchased a AEG fridge/freezer from Makro in December 2018, due to renovations at our house we only started using the fridge the end of February 2019. My husband was looking at the Samsung and Defy fridges but the sales guys at Makro Alberton convinced him to take the AEG fridge as it will be the best buy. A month after having the fridge/freezer, it started making a loud high pitched noise everyday and for at least 30 min at a time. I have emailed and called AEG endless amounts of time and have not had one response from them. I then contacted the manager Selwyn Naidoo at Makro Alberton to assist me as his staff convinced us to get the AEG brand. He managed to get someone from AEG out to come look at the problem and they confirmed that the freezer needs to be replaced as there is a manufacturing problem. We have now not heard 1 word back from the AEG technician. I then referred my query back to Selwyn who has not responded to 1 of my emails or is always in a meeting and unable to take my calls. This is terrible service between Makro and its suppliers