If you lose your card or it has been stolen you need to disable it via the Viva Wallet web banking.
Watch the first part of the short video below, for detailed instructions on locking your card:
The steps in detail:
Log in to your account.
Click on Cards in the left navigation, then Manage Cards:
3. Click on the Lock Card button against the card you need to block.
4. Next, you can order a new card if required.