DHL has informed the consignee's agent that the goods are being cleared.

You send it through a proxy. In this case, in principle, only guests can assist in customs clearance. If the consignee's agent has been notified, your guest should have gone to the customs clearance company to clear the customs himself. There must be taxes. South American customs are very strict. Therefore, it is best to make a proforma invoice for the next express delivery, and prepare the attached documents for the high-value products, and send the detailed goods to the customers in advance, so that the customers can assist the local DHL in customs clearance. The guest said that the freight you paid was too high.