Speed services courier Drivers demand bribe

My parcel got delivered to me and I was asked to pay cash to the speed services driver. I told him that I needed to go to the bank and asked him if he would wait. Alternatively he could take me to the bank which was 5m down the road. He took me to the shops where I then withdraw the money to pay him. He then got hostile with me sitting in the vehicle and ordered me to pay him R200. I told him that I can not offer him a bribe as this was *******ion, He and his partner started swearing me where i then offered to get off from the vehicle when he stopped. I took my parcel from him and exited the vehicle. I did not sign the documents as I was afraid for my life. I began walking him. The followed me with their vehicle and tried to run me over on the road. The swore at me until signed their documents under duress. They told me that I must go to India where I came from. I am very traumatised by this incident and just maned to get the registration nos. CR 773 ZJ GP. I am shocked that in this day and age the post office has people like this working for them. I am deeply disappointed and traumatised by this incident.