After trying to issue a credit card refund in Altru multiple times, you may receive the error message: Data could not be saved. The amount to refund exceeds the unrefunded amount. This happened because the program could not process the credit card for the 'X amount Credit card, (card type) #(last 4 digits of credit card)' payment.
This error message can occur when a sales order has been refunded outside of Altru through your merchant account. Once an order is refunded it cannot be refunded again. If the order is stuck on a sales page and cannot be canceled please Chat with Support.