I made a giant mistake right now. I just bought

Hello,
I made a giant mistake right now. I just bought a membership a few seconds ago for the user bugmenot1.
I didn't want to buy it for this user, but for another user. This account isn't even my account. I was logged in at the moment of purchase. I already purchased the membership for the other user. Please be so kind and give me a refund.
Thank you very much,
Luca