In such a case, if you contact the supplier company that you rented the car from, the supplier company officials will help you. If you want to deliver the car you have rented before the rental period, the cancellation and return conditions offered by the supplier company will apply. Depending on the conditions of the supplier company, the cost of the days you do not use can be refunded by the company you rented the car. If you want to extend your rental period, you will make an additional payment over the car rental fee schedule determined by the supplier company.