Delivery Drivers that will run you off the road

I've used the service once but their courier drivers are some of the worst I've had the displeasure of being near in the Durban Area. They cut off other cars and don't even follow the basic rules of the road. Their driver almost totalled my car this morning and they don't even have a channel to report such poor behavior. Which shows they couldn't care less about endangering the lives of the public or dealing with such complainta. Poor social responsibility to the community in which they operate, by any standard