Once again Vodacom has cost me time and money

On Saterday the 13th of January I renewed my contract the following Sunday we booked the device in at Vodaworld with a defect on the screen. The person who helped me said its not neccesary to book in the device accesories as the device will be replaced under the OTB Warranty. Today 26 January I got a call from Mulalo who said the device has been replaced under the warranty and I must bring the old devices accesories with. When I got to Vodaworld Mulalo said that they have to send the accesories to the Advanced Repair Centre before they can make out the credit note to replace the device which will only take place on Monday. Therefor I have to drive from Kempton Park again to collect the new device. Why did the consultant not take the accesories the day when I booked the device in? And why cant the credit note not be released and have the vodacom customer care consultants inspect the old device accesories? Now I have to drive up and down waisting time and petrol due to Vodacoms incompitant system.