Don't give up on all treatment providers just because one kind didn't help..
Some providers & techniques are more helpful than others..

* Have you had any recent imaging to check for any changes or new issues? If not that might be worth a look..
Some fusions can fail above or below the area..
or something new is happening..

If no new cause is found..
IFc stim?
low level (cold/soft) laser?

Did the Airrosti do any additional "hands on" massage or other modalities like ultrasound, trigger point /muscle work, posture /head/neck work?