Can a Damaged or Removed Forehead Muscle Tissue Ever Be Repaired from Coronal Brow Lift? (photo)

The brows were higher after a month they were back to normal. After a revision one eyebrow was significantly higher than the other. the higher eyebrow has muscle tissue missing above the brow, the once round and beautiful eyebrow now looks sunken. I wan't to know if something can be done to fix the actual muscle other than fillers? I don't want to spend the rest of my life with a colapsed eyebrow. Why would a Dr. remove muscle tissue in such an asymetrical way?