INDIA DHL is the WORST - day light *******

I have sent one parcel as samples from Johannesburg to INDIA DHL is asking for a customs duty of 3.60 USD [ mere samples ] DHL is asking for a disbur*****t fee [ **************** ]

Charges to receive a parcel in INDIA, although its prepaid? Can someone please explain on top of that DHL threatened if we don't pay , they would return the package back to the sender