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Hi, thanks for getting in touch. I'm sorry to hear about your pain and the lack of apparent benefit from the nerve block. It may be that the treatment hasn't worked for you personally or that it didn't manage to affect the nerve in question adequately for you and sometimes needs trying again. It's often very difficult to get to the exact area needed and can sometimes take more than one attempt. In the meantime we should be trying to get your symptoms under control with things like medications such as Gabapentin or Pregabalin or Duloxetine all of which work very well. Otherwise it's important that you're reviewed by the person who tried the nerve block as well so that they can decide with you whether it should be tried again or not.
It may mean that they didn't actually reach the nerve you see. It's a bit like aiming at a small target, sometimes they can miss and it has no effect as they medication didn't get where it needed to be hence the review by the person so they can decide if they should try it again.
I suspect it just didn't 'hit the mark' so would need trying again, it's a really small target they're aiming for so a miss is always likely. You're very welcome, glad I could help if even a little. All the very best for the future.