Face more sunken after fillers, whats wrong? (photo)

Had fillers a year ago to fill hollow cheek, but the injector is using the same type of hard filler used in the forehead to do my cheek and lips too, I noticed my face had sunken even more, I tolerate the whole situation for 10 months and yes it did dissolve on its own for 70 percent but the problem is where are all my facial fat in the cheek I used to have, could it be that the stiffness of the fillers sit on the fat, when I dissolve it once ,the whole cheek get soften but not to the same level as before