@Vikram27 When you say "bank card", does that mean a debit card or a credit card? There are various payment methods that are acceptable depending on which country you are in, so make sure that your payment method is one they accept. if it's a valid credit card, then this just sounds like an Airbnb glitch (there have been many lately). You would have to get in contact with Airbnb customer service (which is quite frustrating right now- they are way unstaffed) to resolve the issue.