DHL bad customer service

Bad experience with this shipping company. A gift set was ordered and paid for including shipping costs to a South African address. The package landed up in customs and now customs want me the client to pay customs duties and clearance costs which is supposed to be included in the shipping costs as stated on the supplier "Star-Name-Registry.co.za" web site where the package was ordered. It is my expectation that DHL international together with the supplier, is responsible for all costs and proper documentation so the package can be delivered to my home address as requested on the order. This does not happen unfortunately. BAD SERVICE!!!