Good thing that you do realize before its too late. Real twitter account of Yobit is
https://twitter.com/YobitExchange and its a miracle if you do able to receive a reply
from them on a short period of time knowing that Yobit doesnt respond on queries or tickets most of the time.
I did a little search about that yobit codes which i found this
https://bitcointalk.org/index.php?topic=2758096.0so this acts as a code that scammers uses to redeem coins on same exchange users so it was a close call.