I think Ning Billing Help Center is the right place to ask this question.
I'm with Bernard. Shoot us a message from your Support link if you have any billing issues. We'll help you get this settled. Good luck!
Ah okay, thanks. Just found out that I can unlink them directly from Paypal.
Rather than just canceling your billing agreement via PayPal, please contact us when you're ready to cancel your plan. Otherwise, you'll continue to incur balance on your account. You can either call or submit a ticket, whichever you prefer!