Helldivers 2's Steam reviews have tanked since announcing the need to link Steam to PSN, but Arrowhead say it's Sony's fault and they're on players' side.
Go to your purchase history, find the purchase of Helldivers, click on it, click on I have a question about that transaction. Then write your refund request
I tried a 2nd time and no dice on a manual review. Same automated message.
Go to your purchase history, find the purchase of Helldivers, click on it, click on I have a question about that transaction. Then write your refund request