Unless there are some proofs that you have included, we can conclude that you have been scammed. But you haven't so, let's not say that you haven't scammed.
Nobody cheated on you. Personally, I received coins on the exchange wallet, sold them and withdrawn them.
If this guy has received coins himself, then it means that the bounty paid him and others.
Fallacy. I am not the only one who is in this situation. I was able to contact them in the deadline. We filled up 2 KYC forms and ended up well, and now they are saying we didn't filled it up.