Wow! For one, we definitely need to find these terrible people who keep scamming him. But, on the dementia caregiving end, I first have questions: what phone is he using? Who is calling? Can you disable the home phone or whatever he is using to get calls? Someone clearly has him marked as a target- this doesn’t sound random. If he has a cellphone, I think you need to get it away from him, disable it, and return it to him. Suggest that it’s “broken” and “needs to be fixed” – and then never actually replace it. You can also block certain numbers with your phone carrier. If it’s a house phone, get rid of it. The police definitely need to find out who is calling. If he sent money it should be traceable.