Reckless driving and human endangerment

HH 35 FS GP driver nearly ****ed me and my family this morning, I had just passed the trailer wheels when the driver turned on his indicator and just changed lanes had to swing in another Lane almost hitting other cars when I ask him if he didn't see me he tells me that, that's a truck I must watch out I then ask him do we just drive anyhow when you driving a big car he then says get in front of this truck and I'll show you what I'll do to you before me he did the same to a white bakkie so this makes me question the level of professionalism of action fuels.