Be careful with Kucoin.

I held BTG there and didn't notice that they delist this coin.

Now the BTG have disappeared from my wallet. I understand there was an announcement last year about the delisting of Bitcoin Gold.

But I don't think it's correct to just steal the BTG from users and (most probably) sell them at their profit. They should at least send a personalized email to all users of a coin shortly before the delisting.
Or sell them and refund me the coin value (at a discount for their work).