If you pay for your subscription by credit card, and you want to change the linked card:
Open the BlancVPN Telegram bot. Type
/start
to open Main menu.Click on Manage subscription and choose Link another card.
Choose the card to link.
You will see the link. Follow it and make the test payment (1 euro or equivalent). The money will be instantly returned to your bank account.
Well done! Now a new payment card will be displayed in the Telegram bot.