The money does not come through the fault of the Middleman

Good afternoon!
The dispute is as follows: on 7/9/21, the intermediary confirmed the closing of the transaction of the three parties without my consent, although I did not receive the money at that time. The intermediary also indicated that there is a "small" delay with the transfer of money from the user.
After that, I requested my money via VISA, but almost a month has passed and nothing has come.

The user with whom the transaction took place:
MarkG
https://www.playerup.com/markg;
the total amount of the transaction was supposed to be $ 515;
I am a seller;

I wanted to say that if the money is not transferred by Wednesday, I will write to the technical support of the game that the account would be blocked.