It sounds like you have already tried several treatments for your scar, including CO2 laser, Bellafill, and Alloderm. However, if the scar tissue keeps sinking back down, it's possible that the treatment options you have tried so far may not be effective for your particular case.
You may want...
I have done Alloderm for lip augmentation for many years. The longevity of the tissue implant varies, I have observed multiple years with excellent fullness. The size of the lip augmentation can be varied depending on the size of the implant.
I assume your Alloderm was placed in order to support the implants. If this is inflamed, you will need both the implants and Alloderm removed. This may result in deformity of your breasts. Unfortunately, you have not provided photographs or told us your bra size. It is possible that you can...