Mrs. G,
I’m afraid there isn’t any going back. 
You could get lucky and have some adventious shoot come out down lower, but if the trees are very old they tend not to do that.
I made the same mistake on some of my first peach trees. I still have one of them. It’s a funny thing to look at. The scaffolds start about chest high or higher. To keep the tree w/in reach I prune it very vigorously. It transformed into a kind of weeping peach tree.
Blueberry,
I sent the pictures above on my phone at the farm. Now that I see them at home, I notice they don’t seem to show as much wood as what is really there, so perhaps your trees also have a lot more wood.