Like the other comment mentioned I'd try https://www.cgsecurity.org/wiki/PhotoRec first.

Just a heads up with proper data recovery it's usually a good idea to dump an image of the media card to your drive and do any data recovery attempts against that image, not the media card itself. I would usually use ddrescue for that but you'll probably be okay with standard dd too if the card itself is fine (as you said the deleted files were user error, not a failing card).

PS - You should definitely not use the media card in the camera until you're done with recovery attempts, the more you use it the less likely you'll recover anything off it.