Redirect calls from hidden numbers before I pick up

I'm getting calls from a hidden number. Since the first call I've set up a blocking rule for hidden numbers, but they haven't stopped. I want to get a little more creative. The next time they call, before I pick up, I want to redirect the call to the Dutch embassy in Dubai. I did some googling and Dubai numbers are the most expensive to call where I live. Ideally, this will be automated, but I'm happy to do it myself the first few times. Is there a way to do this? I'd be happy to pay a few bucks for a third-party app.