Skin atrophy after keloid treatment of Tummy Tuck scar? (photos)

I developed several small keloids alond my scar, with the largest at 1 of the drain sites. 18 months after my tummy tuck sugery my PS injected them with steriods. Weeks later they flattened out then later develped into deep indentations. What is the best way to correct this? The issue seems to be that the steriods melted away all the fat under the scar so I am not sure scar revision will be an appropriate approach.