An alternative way to buy Premium Membership? How do I contact support?

I want to pay for Premium Membership (1 month, recurring).
But when I try pay via Subscribe, button, Paypal redirects to payment via CC. CC is not linked to my PP account.
How can I receive an invoice for direct payment to the paypal address?
How do I contact support? I tried tweeting but got no response.
Thanks for any help!