I don't think that what your cham is experiencing has much to do with the suppliments he is receiving.
What you have described sounds more like a neurological problem. Perhaps a stroke, or spinal cord injury.
Regardless of what it is, it is beyond the ability of anyone being able to help over the internet.
He sounds like he is in big trouble, and needs qualified Vet help. Not just what we can guess at on line.
Sorry I couldn't offer more help, but a Vet in this circumstance, is the only choice.
Good Luck to you, and your Chameleon. I hope it turns out okay.
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Kim