The email verification code issue could just be a technical problem however, I can't comment on what will happen to your personal information like the facial recognition.
If I were you, I wouldn't join any airdrop with such requirements. There are better ones at paldo.io -- although, it's a curated list made by a reputable member on bitcointalk, it doesn't mean you shouldn't dyor.
Although I haven't started the facial recognition yet, I was waiting for them to send the verification code in my email before moving to the next stage that's to complete the facial recognition but I'm glad they didn't send the email who knows what would have happened next, although I don't save any of my asset in that OEX wallet address, I make several research about this project before participating I never knew the end is going to be like this.