Parts failing. No service for replacement.

Job Card nr's 343035 & 399045 refers<br> On 15/04/15 Defy replaced the umpteenth thermometer on my Defy 831T oven.<br> Just as the 3 month warranty was over, the thermometer ONCE AGAIN was faulty.<br> On 19/08/15 I contacted Ronald Claasen - *** - he agreed that there is a fault with the part & that he would send technicians to replace the thermometer. They only came 2 days (21/08/15) later with NO parts. Only on 26/08/15 they came to replace the part. The nxt day (27/8/15) I reported that the part is NOT working. I baked rusks. The outside of the rusks were scorched black & the inside was raw. I spoke to John, the technician. He said he would report back to Ronald & order a new part.<br> Today, a WEEK later, there is still NO NEW PART, NO ANSWER FROM DEFY and despite umpteenth calls to & messages left for Ronald, NO FEEDBACK from him. John tells me the part is on order. For a week already???<br> WHEN WILL MY OVEN BE REPAIRED? This has been dragging for more than 2 weeks now. <br> The service is absolutely pathetic. I will not keep quiet. It will not \go away". I want my oven repaired. I've paid A LOT of money over the years to have THE SAME PROBLEM fixed over & over - NOT ACCEPTABLE"""