Since a blocked transaction is also a payment guarantee for the merchant, we cannot terminate, or credit, any blocked transactions.
After we authorize the payment it is up to the merchant (or the payment processor of the respective merchant) to decide what to do with the payment.
In case a transaction is canceled by the merchant but still appears as blocked in your VIABUY prepaid Mastercard account:
You should contact the merchant directly, and instruct the merchant to cancel the payment authorisation, using the exact same 6-digit authorisation code used to authorise the initial payment.
In case the transaction is not completed by the merchant (or cancelled incorrectly):
The amounts will be automatically unblocked after 30 days and credited onto your card account.