seems all these convention ovens pack up after

This is the second convention oven i have had and the second one to get the same faults the first one the movement rotate gave up about six months ago and yesterday the element at the top packed up same as the second one and it seems even after we had the items replaced on the first one it still didnt work propery. We have a defy convention silver - we bought it at hirschs in hillcrest when they had a promotional sale on but as we had a lot of documents ****** we cant verify when we bought it.<br> Anyway we are most dissapointed in these so called convention ovens. I have an lg grill intellowave which i have had now for about 15 years and it still works perfectly, looks like modern technology not up to standards