No one should be saying "you have scoliosis, here is the treatment", they should be looking for an underlying cause first.
There may not be one, but there may be and if there is then you need treatment for that.
Was the X-ray taken standing? The reason is that physiotherapists always get a shock when they see my back when I'm standing. I look like I have scoliosis but what I actually have (amongst propper medical conditions) is one leg longer than the other. Everyone has one leg longer than the other but there is a bit more distance in mine so as soon as I sit or lie down my spine is straight (although arthritic).
I have insoles in my shoes (also have dodgy feet) that correct the difference and it makes a huge difference pain wise.
I'm not minimising your pain/condition just making you aware that things are not always as bad as they first seem.
I take amitriptoline and struggled for a while but I was then given this advice.
Take 2 weeks off work and take it every day. On day 3 you will be zonked out, not with it and want to give up. This is what most people do. Stick with it, in the second week you start to feel better and by the end of week 2 it just does its job.
This worked for me and another person I know with chronic pain.
Personally if there is going to be any manipulation done I want it done by a physiotherapist. I'd also want to know who was reporting on my X-Rays, I want a Radiologist report at some stage.
All my treatment has been on the NHS, I have had
Rhumatology appointments including X-Rays and blood tests
Physiotherapy
Hydrotherapy
Orthotist Appointments
various splints, shoe insoles and other bits and pieces
Occupational Therapy