Hi Gumbo.
I reckon that the first thing to do would be to get those support wires back in place.
Then tie in all the long vines that are there and cut off any of the weak ones.
By the end of summer you should be able then to sort out which are the best to leave and which others to remove completely.
The main root system seems to be ok as the vines show.
Vines are remarkable tough and very long lived....so good luck.

An apple a day.....keeps me in work.