This ain't going to be pretty, good to see no one was injured, a dual cab to pull a van of that size, without proper wait over the rear axle on the dual cab...askin for trouble at speed, ie over 80kph.
There is going to be some serious finger pointing, egos, lawyers..man.... this is going to get nasty...
Towing a decent van of this weight and size say 2000kg, that is some serious weight being pulled behind an unloaded dual cab, talking about having a tiger by the tail.