Easy! Just take a picture of your receipt vertically. Saved! will do the work for you. It will recognize the data in the receipt looking for the relevant information and it will save it in the cloud so it will always be available when you need it.
Just access the App and go to the receipt detail. Click on the thumbnail to see the receipt on full screen. You will be able to zoom in if necessary. The staff at the store will have all the necessary information to manage the refund.