What happen if the buyer refuses to make payment?

Please wait for buyers to make payments. The trade will be cancelled automatically after the payment window (from 15 minutes to 2 hours which is specified when creating an advertisement, the default time is 15 minutes) if the buyer doesn't make the payment. If the trade got cancelled (automatically or by buyer), even before your Bitcoin confirmed, Bitcoin will stay in your Remitano when it's confirmed. You can check the balance on the top header bar. Then you can then sell to other buyer or withdraw later. If you want to sell to others you perform the same tasks, find suitable buyers and sell, you don't need transfer BTC because it was available at REMITANO wallet.