Can you dissolve biphasic hyaluronic acid dermal filler? Possible to have fat transfer over it?

Hi I had 4 rounds of BBL most of them reconstructive work. I tried 300ml of Genefil dermal filler to add some volume to my butt. But now I’m struggling to find a surgeon who will operate on me after having it done . Is it possible to have it dissolved as its FDA approved filler ? Or is it possible to have fat transfer over it I know some doctors combine fat and filler together . I had them done 5/6 months ago