CANNOT RELY ON DEFY

I reported that the Dial on my Gemini double oven was broken to Defy on the 13th November 2015 and was told that someone would come out on the Monday. Nobody came so I called again and was told that someone would come out on Friday 20th November. On the Tuesday 24th December the technician came and looked at the oven and told me that the 'Dial was broken' and he had to order the part. Tuesday 1st December 2015 Defy service told me that still waiting for the part. Finally on the 15th December technician arrived but he did not have the correct part but said he would try to source the correct one before Christmas. I haven't heard from him since. I phoned Defy on 11th January 2016 and was told that they had to make a part and the factory only opening on 13th January. On the 18th January 2016 I phoned Defy again and was told the technician was on leave. When I gave the history of Ref. No. 452906 and after a lengthy wait, was told that the technician would be coming on Tuesday 19th January, 2016. I am still waiting. Whilst one is holding on for the Service Department the advertising blurb plays: You can rely on Defy - No! Nationwide parts - No! Reliability - No.