If you have a billing issue or if you want to cancel your membership, you should visit the billing page that you've used for signing up. We do not touch your credit cards / Paypal accounts / other payment methods IDs and we cannot cancel your membership at any time. But the billings can.
The respected billers we work with and their billing support pages:
CCBill - https://support.ccbill.com/
Epoch/Paypal - https://epoch.com/
Other - https://secure.premiumbukkake.com/cancel/