Bought ChatGPT Subscription via Apple Pay but did not receive the Subscription

About two weeks ago I purchased the ChatGPT Plus subscription via Apple Pay and even though it said that the payment was sucessfull and the money was booked from my bank account, I never received the actual subscription. My ChatGPT Account still said that I'm on the free plan and I did not have access to the Plus content.

I tried to get a refund via reportaproblem.apple.com but my request was denied without any comment from Apple and even after requesting a re-check from them they just denied it without any comment.

Now I am kinda mad because Apple literally just took my money without providing the actual service I paid for. (Which I'm pretty sure is fraud)

Because Apple already re-checked my claim and denied it again I have no option anymore to apply for a refund via reportaproblem.apple.com. Does anyone know another way to contact support and maybe get a more detailed answer here?

Thank you in advance.