Neighborhood hacker is threatening me for not hiring them. Is this real or just a threat?

The job is almost done. I still have not received even the first payment. If at least first payment is received today we can continue as planned. If not, you will be ruthlessly punished. Starting with sending the administration your emails and putting your information on our dark web database, where hackers from all over the world go to see who is better at ruining people's life's. Your choice