Ans. If you think that you have been charged more than you should have, then in that case you can contact the customer support team of the airline along with the proof of payment. After looking into the details, the customer support team will assist you in getting the refund through the original payment method if you have been charged wrongly and you are eligible to receive the amount which has been paid extra by you. This is not something that happens commonly although. The airline makes sure that it charges it's passengers fairly.