Terrible Service from DHL

I am a first time DHL user, and I am horrified by the lack of urgency and delay with delivery of my shipment. I bought goods in china on the 04 of June 2015 put the goods with DHL china on the same day. I got a call from DHL SA on 06 June 2015 to say the goods had arrived in SA and they needed payment for the shipment. i was absolutely impressed by how fast the goods got to SA, but little did I know that the nightmare had just begun. I made payment for the shipment clearance on 11 June 2015 and a DHL agent emailed me that my shipment was stopped by customs for inspection,and they asked for further supporting documents like the invoices.my passport etc. i provided them with the required documents on the 12 June 2015. Today is exactly a week since i gave them the docs and made payment for the shipment and I still DONT have my parcel. I have been calling and emailing DHL customs agent, who keeps telling me that there is nothing she can do for me as there is a delay with customs and not on their side. She says the system shows that the parcel has been pysically inspected and the documents have been checked but there is no response about delivery.<br> What do I do DHL?