Find "My Vodafone"
Click My Vodafone.
Select option
Select one of the following options:
Top up data, go to 2a.
Check balance, go to 2b.
Top up data, go to 2a.
Check balance, go to 2b.

2a - Top up data
Click the field next to "TopUp online now".
Follow the instructions on the screen to top up data.
Follow the instructions on the screen to top up data.
2b - Check balance
Click the field next to "Account Balance".
Your balance is displayed.
Your balance is displayed.