Hi. Do the following to access the recovert menu.
First turn the Vodacom Power Tab 10 off.
Hold oth Volume down and Volume Up with the Power key then release power key after around 3 seconds and continue holding the Volume keys until the Boot mode menu appears
Scroll to Recovery and short press Vol up to select. You will see a Robot laying with its belly opened.
Then hold both Vol keys and then short press Power to display the Recovery Menu.
From the Android Recovery menu, scroll down with Volume Down to Wipe data/factory reset
Select with the Power
Scroll to Yes---delete all user data
Select with Power key again
Reboot now with the Power after the wiping it complete