I feel it's unlikely that they ignored his emails and calls for 3 years. I'm thinking he may have called or emailed once or twice and is using that as an excuse.
I worked in a zoo, not directly with crocodilians, but I know that I wouldn't let a kid swim with one. That seems like one of those things that are fine until it's not. Also if it can get out then that's a really bad thing.
I do think it's probably better for them to give him another chance to fix the conditions and I really hope he does what he's told.