You can update your payment method via your account settings:
Go to Settings > Account
Select “Change payment method”
Choose “Credit Card” or “SEPA Direct Debit” (automatic collection from your bank account)
If you chose “SEPA Direct Debit”, choose how to authorise the mandate: iDEAL, Bancontact, eps, Pay by Bank or by entering your IBAN
Click “Continue to payment” and follow the payment steps. A one-time first payment is made to establish the mandate. After that the new payment method is registered and future invoices for your RCUR package are collected with it.