Bad service

My package is stuck at OR Tambo since 6 March 2016 so today it is 16 days. Documents and payment have been provided as requested by my service provider and yet the package remains stuck at OR Tambo due to some customs issue which DHL doesn't seem able to resolve or is reluctant to sort out. I think any customer would be very frustrated by now and this is unacceptable. See waybill: ***.