Unfortunately that payment has been processed since long time ago.
We had identified the hacker and they are the same person which is the zoom uploader tool admin
1. They cannot change your default email.
2. There is no way to reverse BTC payment
3.
4. Even if you are not using uploader tool, your details may be leaked somewhere else.
We are in process making that no one will be able to change payment method/address unless user contacting us through support directly.
Sent you an pm to reset your password.