Bad DHL brand representation for US visa services

Hello I have spent 45 minutes trying to get the phone number of the Sandton Branch here in Johannesburg, Was given the wrong number by a clerk Thabelo,, called back, spoke to supervisor Mr Zakhele Dube. Asked to speak to Manager Carmen Doyle. She is out and unavailable. I am emailing her now. Quality of sound on the phone completely inaudible. This is a shocking service and total compromise to DHL brand representation in South Africa.I would like to inform the US embassy about my experience in Johannesburg with DHL and the inefficiency in servicing their visa delivery requirements.Waybill ***