Irresponsible driving in company marked-vehicle

Just want to report Nano Fibre White Van Registration CF60681 yesterday direction Parow towards Boston, Bellville. Time shortly after 5pm afternoon. Driver swerves in front of vehicles, no indicators. Seems to be playing on the road. When stop at robot for instance, Two Right side wheels of vehicle in different lane than Two Left side wheels. And I'm battling to get company's attention. Have complained online, no response. When calling ********** 092, get machine answering.