The same thing happened to me with the folks that have the animals. We had photos with the tiger cub and when we got home nothing was on the CD.
Just an idea, when the guy comes around, give him xx$ and your SD card, get the card back when he is done.
I guess there are a lot of photography "issues". Our official TTR photographer sold us a disk of pictures but watermarked them so they couldn't be printed. Never returned our emails or calls. He made it clear we could print anywhere and we were buying the negatives
We just got back a couple weeks ago and we purchased the cd with the animals and I was worried it would be blank but fortunatly they were all there. Really sorry for your bad luck!