The answer is very easy "So far there is no evidence that any of the $500,000,000 was paid directly to Donald J Trump.".
Unfortunately that does not answer the questions:
Was any of the $500,000,000 paid to Mr. Trump?
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Did Mr. Trump derive any personal benefit out of the loan?
We will never know if any of the $500,000,000 was paid to Mr. Trump because of how easy it is to launder money.
We will never know if Mr. Trump derived any personal benefit out of the loan because the license fees for using his name are not paid directly to him and once those license fees are mingled with money from other sources it is impossible to differentiate them again. I am sure that you would be more than willing to agree that "Just because X resulted in Y increasing its profits by Z and shortly thereafter the owner of Y received an increase in income of Z." doesn't actually prove that X resulted in the owner of Y receiving an increase in income of Z.