Peanut Ball Advice

I’ve recently bought a peanut ball to use to try and get rid of my costo which I’ve had for roughly 10-11 weeks, what exercises would people recommend doing to help get rid of it? I have currently just been laying on the ball with my back around my shoulder blades for roughly 10-20 seconds and then moving to a different spot. I’ve been doing this for about 3 days twice a day and I think it’s helping as I can breath a little better after but the tightness comes back after an hour or two.

Any help would be appreciated