Intimidating driving by Royal Funeral Services

Today on the N4 from Rustenburg to Pta close to the Marikana Toll Plaza we encountered absolute dangerous driving from a couple of Royal Funerals vehicles. They continued to try to overtake in the yellow lane. I blocked them where I could. One was able to get passed and also passed a Total petrol truck (no yellow lane driving). There was a long row of cars behind this truck including ours. The drivers of 'Royal Funerals' were intimidating and put us all in danger. Close to Marikana Plaza the Royal Funeral Mercedes he**** overtook us on the right with on coming traffic, pushing us unto the yellow lane. Luckily at the toll they (Mercedes and chev bus) exited in front of us, but vindictivley blocked our every move. Mercedes remaining in the yellow lane and chev bus in the normal lane, driving alongside each other. We managed to take photos and get there number plates. We have never been threatened like that before on a road. Action needs to take place. Number plates : Mercedes: DC23RMGP Chev : BL65BWGP photos available of the incident if required.