All credit card transactions would show as "pending" in your statement because banks need some time to update their systems. However, as we deliver the gift cards to your app immediately after payment, that transaction is final already and we are unable to cancel or reverse that transaction anymore.
After a few days, depending on your bank, the transaction will finalize and settle.
As stated in the app, all gift cards are non-refundable.
For certain issues that are merchant-related, for example, you'd like to refund the products you purchased with a gift card or if the merchant canceled your order, you should contact the merchant directly. You can also see these articles:
Merchant canceled my order
How can I return a product purchased with a gift card?