If you can't post a picture perhaps you can better explain
what you mean when you say the, "The clamps don't work."
Do you mean the rubber clamping bumper doesn't contact
the workpiece at all or not hard enough to hold the piece?
Or do you mean that the rubber bumper contacts the workpiece
but you're unable to get the clamp to continue it's full range
of motion and lock down? Or do you mean that the movement
of the clamp is very stiff and hard to move? Those are the
only ways I can think of that a toggle clamp won't work. The
first two problems can be solved by just adjusting the height
of the threaded rod that the bumper is attached to. It might
take a little trial and error but it's really pretty simple. It it's
just too stiff then try lubricating the pivot points a little.
I've purchased some clamps from Harbor Freight that are
probably the least expensive toggle clamps available anywhere
and they work just fine. I can't imagine there being anything
defective with these unless they're homemade. Either that
or you're just pulling our leg to see how many responses you
Post a picture if you can.