Rude and unprofessional director

I'm a virtual assistant and a client asked me to contact SVJ Attorneys to finalise a contract after the director of SVJ Attorneys stormed out during a meeting.

I emailed their director to inform him that I'd be taking over the communication between my client and his company. He immediately sent my client a voice note via WhatsApp saying "I won't talk to someone ****ing else. Then get yourself another lawyer. I'm definitely not going to talk through someone to you, then you get yourself another lawyer. Do we understand each other clearly? There's no ****ing way that I'm going to speak to someone else to get to you, you're not that important." He then sent 2 more messages, one stating "You're looking for **** you can't handle" and another saying "I won't for a **** work through [your PA]."