Epic Games Keeps Declining My iyzico Card for Hitman World of Assassination

Today, while trying to purchase Hitman World of Assassination on Epic Games using iyzico as my payment method, I keep getting a "Your credit card has been declined" error. My card has sufficient balance, international transactions are enabled, and I have manually increased my virtual card limit — yet the same error persists.
I have previously been able to make successful payments through the same card and iyzico on some platforms, while running into similar issues on others, which makes the whole thing feel completely random. Being unable to complete this specific payment on Epic Games makes me question the point of keeping money in iyzico at all — since the whole reason I transfer funds there is to be able to spend them.
I am requesting that Epic Games properly support iyzico payments — a widely used payment infrastructure in Turkey — and eliminate these nonsensical "card declined" errors. I am also asking iyzico to clarify why this payment is being rejected and make the necessary corrections on their end. I want my payment to go through and a proper technical review to be conducted so this issue does not keep happening.