So, let them talk!
By letting your customers vent without interrupting them, you can prevent many other issues and will probably get to a solution a lot faster.
Surely enough, being a good listener in this situation does not mean allowing physical violence, threats, or any other aggressive behavior. If it gets to this point, it's time to call the police!
Anger is a limited resource, so it's usually better to just let an angry customer vent when the valve is released. Watch this video to learn more: https://www.youtube.com/watch?v=rt1DEkxVbds.
Source: Vendhq, 2021.
Photo by Clay Banks on Unsplash.