Pretty clear that Go-Go is just a WhiteBIT reseller - the on-chain transfer shows the funds went straight to WhiteBIT. What probably happened is that WhiteBIT froze the funds, and now Go-Go can’t really do anything about it.
That’s basically how these guys operate: they’re not doing the exchange themselves. They just take your crypto, pass it to WhiteBIT (or whoever their liquidity provider is), collect a small cut, and wait for the trade to go through. If something gets flagged on the other side, like in this case, your money gets stuck and Go-Go hides behind some "KYC/regulatory" excuse.
The problem is, you think you’re dealing with an exchange, but really you’re dealing with a middleman who has zero control once the transaction hits the backend.