It is very strange and unexpected, since Bitunix is ranked 40th in the Coinmarketcap rating. I can assume that you have become a victim of scammers who use the original name Bitunix, but in a different domain zone. The correct domain zone for the Bitunix exchange is in com, and where were you registered?
Actually I am not popular with bitunix exchange but I checked all data at ChatGPT and said many bad respond about that exchange from market access not running well, KYC procedure until many user complaint about withdrawal process not faster. Right domain exchange of bitunix is dot com but usually all exchange have many kinds of domain like Binance could use dot me domain.
Usually I use exchange have been popular and have much transaction volume, when arbitrage any coins from several exchange always priority with exchange available much volume transaction and keep away from not popular exchange.
Sad with your loss bro @pornluver wish you have chance get recovery back although have verify KYC, its huge amount if market seized your account without any refund or getting solution yet.