You may always change the credit card you use to pay for the subscription.
To link another card:
1. Log in to your BlancVPN personal account.
2. Go to the «Subscription» page. You will see your subscription details: the linked card, the renewal date, and the number of days left until the renewal. Click on the gear icon.
3. The dialog for setting up the payment method will appear. Click on «Switch to a credit card».
4. Type the card’s details and make the test payment (1 euro or equivalent). The money will be instantly returned to your card account.
5. After the payment is confirmed, go to your personal account.
Well done! A new payment card is now linked to your account.