This is my first time hearing about the platform. Would you mind sharing evidence backing up your claims, like screenshots of conversation you've had with their support? Also, did they say why they want to deduct the 466.4 from your total funds? If not, then that sounds suspicious, they should at least give a reason why they want to deduct that money from your funds.
I checked their Trustpilot, and their rating is 2.8. It seems like it is not uncommon for them to suspend accounts. Also, I saw one of the
complaints on their Trustpilot say that after he filed a complaint to SEC and FinCEN about Bitunix and then contacted the Bitunix retention team to inform them about it, his issue got resolved. Maybe try copying what he did.