Generally you pay 10% when booking, and the rest at day of flying. The 10% is not refundable for any reason.
You can pay in many ways! Do you represent a company or an organization , the operator can can send bill / invoice with 14 days credit . Are you a private person ,you must pay cash or by debet card. Payment by Credit Card or PayPal (3.4% fee is applicable) may be possible by some operators. You and the passengers are all jointly personally responsible payment of our services . Only exceptionally, cash payment accepted.