How do I pay for it from the web?

i can't contact the customer about prepayment. so i request a booking to cancel the booking of this customer or booking can contact with this customer to help me.

M Adamopoulou

This is a space to chat and advise with other Booking.com partners, and it sounds like your issue would be best resolved from one of the booking.com support teams. You can reach out to them via your Extranet Inbox tab and send your request.