Shocking service from DSL Telecom

App**** for Telkom LTE Data Package delivery arranged today 31/12/2018, I called the call centre this morning to confirm time of delivery and the delivery address, only to find out the address recorded for delivery is 65 witkoppen Sandton the incorrect address. This address appears nowhere on the application forms submitted and isn't my address. I have had to correct the address and now delivery can only be arranged for wed 2nd Jan 2019, I was not due to be available on this date, now I need to make arrangements to change my plans. How can DSL Telcom after the verification process of approving an application not get the correct address for delivery. This is shocking service and poor.