I had one too for about a month. Nothing worked properly and bits were missing on delivery. Oven door used to open itself when it got to 220 deg C. All the burners were hard to light and one of them never worked at all. None of the switches lined up.
After 3 engineer visits I gave up and demanded they take it away and give me a full refund. Fortunately the dealer I bought it through was very supportive and after a few weeks they gave in.
Then went and bought a Mercury which has been fantastic.
Sorry I can't be more helpful, but you can get them to refund. I suspect they probably get nearly all of them back.
IH
February 2009