Apple is not a bank, did not issue your card and cannot approve or decline a transaction. Only the issuing bank can approve a transaction.
When Apple Pay is activated and identity is confirmed, a handshake is performed establishing connections and security requirements. Once established, data between your iPhone and the merchant is transmitted in encrypted form. This includes a one time use code for the transaction.
The merchants network then handles the encrypted data and sends it to the merchant’s credit card processor. Data then goes to the Payment Network Operator and your bank. The bank decrypts the data and approves or declines the transaction and returns the approval to the merchant and the transaction terminal display the approval or decline.
Apple iPhone cannot create another token without another Face ID authentication and authorization. More than likely the bank glitched, but it could be the credit card processor or possibly the merchant.
Your best recourse is to discuss the matter again with the bank and also the merchant. Since neither entity appears to know how Apple Pay works. I happy to answer any questions that may arise.,