Pathetic driving, for my tax money.

On Sunday the 9th of May at approximately 7pm i was on my way home in umhlanga traveling from Phoenix. On the R102 there was a dsw truck traveling in the center lane, in front of that vehicle was another truck. I was passing on the right lane(fast) lane with my wife and 2 kids. All of a sudden this jerk decided to overtake the truck in front of him and cut on the right lane. I was forced to slam the brake which sent everything I was traveling with tossing and flying. I have a 16month old baby and a 5 year old. Thank goodness they were strapped in the seats. However upon passing the dsw truck I pressed the hooter in rage and anger and to my surprise the driver of the truck, Instead of being apologetic he also pressed his hooter and showed me a middle finger. I then was furious and flagged him down. He did stop the truck and I approached him and asked what is he on and how could he cut without lookingat his mirror. He seemed to be under the influence or on drugs as he stated the road was blocked. So I mentioned to him that I am going to report this. Only to realize my phone e was in the center console of the car. I walked back to the car to get the phone and take his details However he then reversed the truck and took off. I have since Monday been calling a number for complaints(031 311 4002) and there has been no answer. I have a picture of the truck reversing. I also have quite a few of my belongings damaged and want this compensated for. As these drivers clearly have no respect for the road or other motorists. The registration of the truck is NDM 17790