Disappointing after sales services

We purchased our Defy washing machine in September 2020. In April 2021 the machine stopped working. Being under warranty we followed the procedure to get the machine fixed. We waited 3 days with many follow ups to get a technician (Barnards TV and Appliances) out to come assess the issue. The technician left noting that the PC board was the issue on the Thursday. The following Monday the technician was back to replace the part however the incorrect part was brought along. We are now a week down the line and have had no further communication as to when the problem will be fixed. This after numerous follow up calls from myself and my wife with zero timeline as to when the part will be available and the issue sorted out. That being said we have now been without a washing machine for 3 weeks. Very disappointing and at our wits end. Neither Hirches nor the technician or DEFY have given us any answers. Very unimpressed with the service that we were encouraged to pay for in advance when purchasing the machine. At this point it feels like a waste!