Do you have a multi-meter and are your ok with working on electrical devices? If not get someone who has the tools and the knowledge, but check that the cooker is still getting mains power.
Is the mains fuse in your consumer unit blown, or if it’s a resettable breaker, is it tripped?
If the mains supply is good, what element(s) were on when it went pop? If the mains is good, other elements should still work.
Find out what is bust and decide if you want to tackle it yourself. Perhaps a heating element has burn’t out and gone open circuit.
If you attempt any repair, disconnect the unit from the mains before you dismantle the unit!
Good luck.