I can’t refund my subscription

They gave me an iPhone, and I never used it. I created the Apple Account, and started installing apps. Accidentally bought a subscription to the app. I wrote to the app support, they said to return through reportaproblem.apple.com. I applied and waited for a day. They canceled. I filed again, again waited a day. And they closed the refund completely. It was my last money. How can I reapply for a refund if there is no button?