iv done a google search and could find no specific firmware for Vodacom however I have found some for south Africa which I will list below
DefaultCalDataWithBoot should be placed in the bootloader section
if you have the pit file and the bootloader you can also tick repartition in odin although if it goes wrong you could hard brick your phone with this option
I cant see why it wouldn't detect your network with the correct firmware and working sim cards with an unlocked phone - the latest firmware to the one you have given is S5360_XXMI1 which you can find on my firmware thread - Link in my signature
Below are south African firmware from sammobile - you will need to split this firmwares with splitfus2 in order to flash them with odin - There is my guide in my signature for how to do this if required
PDA: S5360XXMI1
CSC: S5360OJCMI1
MODEM: S5360XXMG1
http://www.sammobile.com/firmwares/3/?download=20534
PDA: S5360XXLG2
CSC: S5360OJCLH1
MODEM: S5360XXLG2
http://www.sammobile.com/firmwares/3/?download=8641
PDA: S5360XXLG2
CSC: S5360OJCLH1
MODEM: S5360XXLG2
http://www.sammobile.com/firmwares/3/?download=6693