Check your payment transaction and see the details in payment event. If the status is Accept, but no P/N ref and Auth. Code generated, this means the card was not charged.
To replicate the scenario:
1. Navigate to Transactions > Customers > Accept Customer Payments.
2. Fill in all required fields.
3. Under Payment Method tab, mark the CC Approved checkbox.
4. Click Save.
5. Check payment event details and see that no P/N ref and Auth. Code generated.
Edit the Payment record and then mark the Charge Credit Card checkbox instead. Then, click Save. It will charge the card and it will go through the credit card gateway.