We understand that in the heat of the moment, it can happen that you select the wrong product or the right product for the wrong country. Unfortunately, once a top-up code has been sold, it cannot be resold or exchanged. We'd like to explain why. We cannot verify whether a sold top-up code has already been redeemed or will be used in the future. This is similar to top-up cards purchased in stores. Once the code on those cards has been revealed, the card cannot be resold.