First of all, Photo points that can be used in the shop are saved in the system data and are shared across all save data.
However, items exchanged are saved individually to each save data.
Therefore, if you did not save after exchanging an item, the points would have been deducted, but the item would not have been granted.
We sincerely apologize, but we are unable to restore points or items in this case. We kindly ask for your understanding.
Please make sure to save your game after exchanging points.