A very expensive lesson. The only person at fault here is yourself, and your lack of knowledge. Someone with a good understanding of Bitcoin wouldn't touch a website asking for a key, seed or anything of that kind with a 10 foot pole.
Another way of donating is, by using your address for faucet references.
That is against the rules.
I claim from faucets every day ...
Those are a waste of time. You're better off working minimum wage.
Are there any forum accounts linked with this?