Treatment for permanent bruising post subdermal injection? (Photos)

So, it all started when I used to get acne across my chest when I was on the incorrect contraceptive pill. When i started roaccutane, my skin healed pretty quickly but I was left with one singular raised keloid scar. I have had this treated with intrapersonal corticosteroids which helped flatten the scar significantly, but I am now left with a permanent bruise. Are there any treatments or lasers to help me with this? It has been this way since jan 2022 and is not improving.