Hi and Welcome!
I had surgery on both hands over about
a 2 year period and I had instant relief from the pain. One thing my doctor told me is that if you let it go on for a long time without treatment you can do permanent damage to the nerves. I don't know if this is what's going on but it's likely. I too would be cautious to have more surgeries and if I did I would certainly choose a different doctor. This guy might be fine but a second opinion and a different surgeon might stop the pain circle you are in, or at least you will have a better chance. Like Dani said, you might have to undergo another surgery, who knows, but you certainly aren't getting any better the way you are.
I do know what that pain feels like and it's awful! Ask your primary doctor for a different referral. If he isn't helpful or if you want to find someone on your own, give a call to the nearest university/teaching hospital. They're on tops of medicine and research and if anyone can get you some relief it's these type of folks. Here's a link to many of the university hospitals around the globe. Good luck!
Chutz
en.wikipedia.org/wiki/List_of_university_hospitals