The procedure you had, the rhizotomies, often does cause more pain in the initial days, as they essentially "burn" the nerves located on the joints of the spine, and the resulting inflammation from the procedure can cause more pain.
However, the theory is that after this inflammation calms down, the neck pain should be better (if this was the culprit for your neck pain in the first place).
I would continue to take your pain medication, and try to give it a bit more time before concluding if this procedure worked for you or not.
The hemangioma is simply a collection of blood vessels within the bone, and generally a normal finding, and not a cause for pain.
Thank you so much... receptionist at doctors rooms said it could take up to two weeks ... and it has been 12 days so I was so worried ! it is really so painful !
Have a good day
Remember everyone is different, so the actual time can vary.
Best of luck to you.