It's not possible to pay by credit card again — just get a generic error when trying to open the payment form. So it would have to be by wire transfer, for which there are no chargeback protections.
I get that there’s a real risk here that you could wind up out another $40k at the end of the day and your problem still isn’t solved, but if losing access to the Meta market is as fundamental a risk to the business as I took away from the post, then it seems to me like job one is to ensure that the business survives and that the (admittedly unpleasant) process of getting trued-up on the $40k is exactly the kind of thing that your lawyer is for.