Very bad driving

This complaint is not about Mr Delivery itself but about a driver of theirs in the Ballito area. We're staying at the Chaka's Rock Chalets and today at 15h30 a Mr Delivery driver had just made his delivery and was reversing to leave. This is where the issue comes in. He was reversing at such a high speed that my wife almost being hit called to him to slow down. He ignored her and when she called to him again as he reversed into a parking to turn around he thought it appropriate to show her his middle finger. I caught up with him at the entrance gate and confronted him about the manner in which he was driving and was told he was reversing very slowly and said I was imagining it when I asked him if he thought I was. My big issue with this is that there are kids running around and it would just take one to run out and be run over. The driver in question was driving a green Renault Cleo with black mags and looked like he was quite tall with a beard. This kind of behavior puts Mr Delivery in a bad light.