I think you have a right to question what has been done. Not to have known ahead of time what vertebra are going to be addressed is a no no. A full explanation of all the steps for surgery should have been told to you. C-7 as you mentioned,was worked on from your post, without you being told..
Do see an independent Neurologist, and go over all those results with him or her.
When something smells fishy it usually is. I hope your wife gets some resolution to where she can be off her medications.
Sometimes however the nerve damage is there, regardless of the fix for surgery. I do have some pain. I do have some medications, that I try desperately not to take. I am fused C3-7. Most times I get along without it.
I wish you all the best. ginnie