Grill and x1 top hob on electric cooker not working?

ON a Belling electric new cooker the grill is now not working after only trying to use it once.
It's also stopped the top left hob working too.. how to solve? Is there s fuse somewhere that could have blown?
The grill was turned up to 6 but then down to 5 when sausages put in and door left OPEN.... can it have overheated?? Any help appreicated.