AEG Electrolux Bad Service

I bought a 150L gyser in August 2020. In September it did not warm up. I called them the first time and they immediately sent someone to look at at it. After the guy left we noticed that the water is still cold. I called their office again on 04/10/2020 they apologized and promised to send someone. I followed up with them on 07/10/20 and i was transfered from one Agent to another until my airtime ran out. When i called them again I was assisted by a professional guy who told me that my details were incorrectly loaded and they are going to send someone through immediately. To cut it short the person came after so many calls i had to make and fix the problem. My gyser only functioned one day and the problem reoccured. I've been trying to get hold of them on their 24/7 line with no success. Im very disappointed and upset at the same time as this is affecting not only me but my tenants also.