We apologize for any confusion regarding the additional payment request from the delivery carrier. While you may have qualified for free shipping on your order, it's important to note that free shipping typically applies to the transportation cost of the package from our facility to your location. However, additional charges such as taxes, duties, customs fees, or other related charges are separate and may be imposed by the customs authorities or the delivery carrier. Free shipping promotions typically cover the basic transportation cost, but any applicable taxes or duties are determined by the customs regulations of the destination country and are the responsibility of the customer.