Hey @Kokomosno
Was it a promo code they did not use or did you have an across the board discount?
Either way, you can go into your dashboard and go to Sales and then Transactions and track down the purchase. This way you can see whether or not the discount was applied. From there, if there was an error, you can do a partial refund to refund back however much you want, and the total value will stay on the card.
Hope this Helps!
