Hacked MacBook Air
I need help urgently, I am a novice apple user and I tried selling my MacBook Air 2020 online, I received a call about it, the buyer asked me to login to my Mac with his Apple ID to verify if everything suited his specifications, unbeknownst to me it was a bad idea, a few seconds later I got locked out of my MacBook and he is asking I pay 200$ Because he has locked me out and I can’t use it anymore unless I get the ‘Pin code’
can anyone tell me what my best option is please?
MacBook Air 13″, macOS 11.2