Invader alien plants in Port St Johns area

Port St Johns's Indigenous forest is threatened by quick growing invasive alien plant species (inkberry, american bramble,guava,casteroil plant,indian laurel,lantana and many other). To try and eradicate these looks like a mammoth task. The Working for Water Project seems not to be working at all in the Port St Johns area. I have started to try and eradicate and kill all non indigenous plants on and around my property (between Ferry Point and Agate-Terrace). I bought a book on invader plants of KZN and have discovered that any piece of disturbed forest gets rapidly invaded by these alien plants and it is very difficult to eradicate these invaders and rehabilitate such an area even if it is a very small area. I pay three orphan school kids from Noqhekwana R50/day on saturdays to help me. If anybody knows how I can go about to get any official or any other assistance in a cause to eradicate the Pondoland's indigenous forest of invader alien plant species. South Africa does only have a few lush forests(Tsitsikama, Pndoland, Drakensberg, KZN and Limpopo) and bushveld (Kruger National Park, Nelspriut, Hazyview), compare to Central-,West-and North Africa. Is there a way to save our forests, maybe declare all our natural forests National Parks?