Bad driving and rude behaviour - Toyota company vechicle driver

This morning, 22/11/2019 at around 06:50, I was driving on the M1 highway heading towards Sandton when one of Toyota's drivers, in a bakkie with a steel cabin at the back was driving in the yellow lane, and then attempted to push me off the road when he decided to cross over *******ly on the yellow barrier at the Roodepoort/Sandton split. I hooted to caution him and then he waved his hands at me and started swearing at me. My daughter promptly took photos of this vehicle and the registration number is HY77TDGP. I called Toyota SA's customer care line and spoke to Yaseen Morgan at around 09:25 this morning, who informed that he will follow the matter up and try to give me a call.