Refuse to refund, and refuse to take calls.
Do not use DHL International if you have frequent incoming goods. We have dealt with them over a 5 year period and import the same product each time. Most of the time they code it correctly and the products arrives within two days. However have had 5 deliveries coded incorrectly by DHL as the incorrect product and paid a hefty fee in handling fees and TAX. The first two imports were handled correctly by Sue Kranz and we received our refund. The last 3 have been a nightmare with emails and paperwork going backwards and forwards for over 1 year.  All necessary paperwork has been supplied numerous times to 4 different staff members, but they put it on the back burner or even file 13 and when we chase it reverts back to us with the identical paperwork requests almost as though it is new.  Sick of this, you cannot speak with the person in charge Siva Pillay he hides behind generic emails that automatically are forwarded.  What now DHL? The refund is +/- R2400 which to them is a drop in the ocean, to us is a huge amount.