Virta customer account works with prepaid model where during registration an initial balance of 30 euros is added from your payment card to your charging account. All the charging events are billed from this account balance, meaning that no separate payments are made from the payment card for every charging session.
Whenever your charging account balance falls below 10 euros, a top-up of 30 euros is made from your payment card to your account. This way there is no need to follow up on the account balance and you will always have enough funds for charging.
If you wish to stop the recurring payments, you can at any point remove your payment card from your account. No new payments are made, yet bear in mind that your account balance can now drain blocking you from charging when there is a need.