Customers can cancel the order at any time before delivery; 24 hours after the purchase is confirmed or after the shipping is confirmed, the order cannot be cancelled, refunded or changed. All orders that are older than 24 hours or have been shipped must comply with the return policy in order to be refunded.Due to processing restrictions, no order can be changed after 24 hours.If you need a refund, please contact us at service.viviebike@gmail.com, we will help you cancel the order and refund the process. It takes 5-8 working days for the refund to be returned to your account. However, once the order is shipped, it cannot be cancelled, changed or refunded. After receiving the package, our return policy will take effect.