Have you reset the breaker in the consumer unit?
If you have then you have probably blown the fuse in the plug
The plug is normally hiding behind the smoke hood at the top
Depending on who fitted it, it will have a fuse in the plug that needs replacing or a fused spur that will need a new fuse
Yes, let me know
Can you follow the wire from the extractor?
Ok, if you follow the wire you will find it
At least you made it through Christmas - well done!