I also have a problem with the Battlefield 1 server rental.
At the end of the process, after payment, the window does not respond to user interaction (with the continuous spinning, progress circle).
However, the transaction was successful (if I close the window).
I paid the 3 euro (the payment service provider and EA also sent me a confirmation email).
But my problem is that my rented server did not appear in the game (and there is no my private server configuration option in the game).
my video - Battlefield 1 - Rent server - 2024.03.31 05:18 (UTC)
https://www.youtube.com/watch?v=9v3jtdh24pY