I do have exercises from the physio. They helped but you have to do them daily.
I will try and describe.
Sit on a chair and cross your arms with right hand on left shoulder etc. Upper body twist x 10.
Lie on floor on right side, right arm in front at 90 degrees, put left arm on right arm so hands touch then lift left arm, keep going as far back as comfortable so you almost are on your back and the left arm is almost on the floor to the left. X 10 then switch sides. This is good for flexibility.
Lie on right side, with knees bent, pillow under neck, right arm can be under pillow. Get a bottle of water/can in left hand. Put left hand in front of belly button on floor and lift but keep left elbow close to your side like a hinge, raise fore arm to about vertical, then slowly lower. This builds strength.
Then there were more of the opening ones, once I did those for 2 weeks, like a pilates band on a door to stretch.
Unfortunately someone told me it can take 18 months to go and this was true for me.