Can you post the model number please.
Thanks for that.
If the oven isnt comming on then it will be the oven switch. These are very common for failing as they burn out on the switch itself.
If fixing this youself you need to remove the hob top and from there you will see the selector switch. Look towards the back of the switch and you will find it has burnt and more then likely melted the wiring as well.
You will need to replace the switch and repair the wiring on there as well to cure this. As i said its quite a common fault on these as ive replaced loads in the past for this fault that you have.
Sometimes before it fails you may have noticed it was flickering the light. It doesnt always do that but sometimes you notice it before it completey fails.
So check and replace the oven selector switch on this and im sure that will cure the fault from there.
I see the question is still open, Do you still need help on this?
If so just get back to me but if not then if you could remember to rate the answer that would be great.