Zanussi ZDQ595 Double Oven

From the first moment the oven was delivered it had been damaged which I Belive happend in dispatch from Zanussi, The replacement arrived and was installed at this point I Belived I had got a good product, the problem starts when you try and cook with it. The problem is the main oven, when you try to cook anything. The temp dial only has marking from 90c - to - 250c but this is no help as the Temp sensor for the oven cuts out 40c below the temp you set on the dial, this happend to the second temp sensor which was fitted to the oven at which point the service technician, the service technician said he would have to speek to Zanussi tecnical to try and sort out the problem this was the 07/12/2006 after meney phone calls to Zanussi about this problem we recived a new cooker on the 04/01/2007 which still has temp sensor problem and we are still trying to get it sorted.