The whole story is full of madness .

_ You use coinbase as a wallet . {extremely dangerous)
_ At once "i guess" you deposited 300k$ to your trading account then purchase 32 btc . {That's crazy}
_ You afford to send the 32 btc at once from coinbase to a private investment platform . {It should be a non-professional one, as no one is crazy to set automatically the refund of 32 btc}
_ You didn't mention that you contacted the private platform team about the issue, i think they are responsible about the consequences of their unprofessional system. {I can't find a reason why you don't mention the name of that platform}

OP , i expect you to have enough knowledge and cleverness to invest a big money in this risky way.
My advice to you can be resumed in this quote: {Good luck & Sorry for you big lost}