Jak, if it was me i would give these doc's the big flick, & find doc's that are willing to help you, if they can't then they should send you to someone who is trained in this field, like a pain doctor.
Its a disgrace to leave you in terrible pain & do nothing for you, looks like you will have to get the ball rolling yourself, by the looks of it.
All of this must be affecting your emotional status and certainly would be aggravating your PN more so.
good luck
Brian