Non Reponsive and Local logictics handling cost more than shipping from New Zealand to SA

I have repeadely written to Thrutainers to explain costs for handling the logistics of 4 pallets (7.6 sq meters) which cost about R25k to ship as LCL from New Zealand to South Africa but R34k for Thrutainers to handle local offload, customes processing and delivery from the port in Cape Town to a local storage facility in Cape town. But I get no response.