In case of a failed card payment, tap 'See all' on the Home screen and find the declined transaction. Selecting it will display the transaction details explaining the reason and advise on what to do to make the next transaction successful.
Most common reasons for failed card payments are:
Note: If there's no trace of failed card payment on the transactions list, it's the merchant who decided not to allow you to use your Revolut Business card. Make sure you provide the correct billing address.
Still no answer? Feel free to submit a support request and we will be happy to help you.