I had the same thing from an accidental purchase-- I purchased the PS4 version of a game instead of the PS3 version, and didn't actually have a PS4. After multiple exchanges and ultimately arguing my case with someone over the phone, they reverse the charge as a "one time courtesy"

The mere fact that you can "buy" a game on the Sony store that is available for multiple devices but not be able to play it on all of those devices is already ridiculous.