Poor Customer Service

DHL South Africa failed to e-mail me my bill for customs/duties regarding my parcel and my parcel has still not been delivered. After repeated phone calls to them, they advised me of a repeating error on their side. The customs/duties invoice was then eventually then e-mailed to me. I have made the payment as per their invoice and I have still not received my parcel as per DHL's estimated delivery date. After another phone call I was then advised by their consultant that they had carried out procedures incorrectly. I still haven't received my parcel. Efforts to receive my parcel is costing me a tremendous amount in cellular telephone calls. I believe DHL's service is nothing but shoddy. I shall rather use UPS in future as they provide a far more professional service than DHL.