If you have an order currently held in customs, it is likely that the carrier is currently awaiting payment for the applicable duties and taxes on the order.
We'd recommend contacting the carrier directly for more information. Once the fees are paid, they will release your package for the remainder of it's transit.
www.FedEx.com or call 1 (800) 463-3339
www.DHL.com or call 1 (800) 225-5345
NOTE - The order total at checkout excludes duties, taxes, and carrier brokerage fees. Your order may be subject to import duties and taxes, which are levied once the shipment reaches your country. Duties and taxes are determined by the customs agency within the destination country and paid to the carrier directly.