Not one Person Returns Calls at DHL

I'm having issues with a waybill getting cleared through customs because DHL incorrectly took down my importer's code the first time it was given to them and submitted this information to SARS. I have since had to phone 6 times and speak with different people to find out when my parcel will be clear. Of the people spoken to, three times I was told that I'd get a call back within a certain timeframe and each time no one has bothered to call me back. <br> <br> Rather deal with UPS whenever you have a choice, the difference in customer service is night and day.