Cancelling a bill pay transaction can only happen before it has been processed. Once this payment has begun processing, you will no longer be able to cancel it.
This is represented by a Status of 'Paid' for the transaction in question, and/or by that transaction no longer having a red [x] button at the end of its row.
Once the transaction has processed, there are two options:
- contact the vendor to issue a refund
- contact the financial institution that the account was signed up with, they may be able to assist in stopping the outbound payment.