What do I need to get preminium hosting? Paypal? I live in Greece and it would be difficult with delivering. Plus, I don't want to give my adress e.t.c....

Bravenet advise the payment options that they accept. Those are the only ones that they accept.

There is nothing to deliver, you are buying space on Bravenet's servers.

If you don't want to reveal your address then you cannot use your credit card for "customer not present" transactions.