Butt revision - how much would it cost?

How much would a butt implant revision cost ? I want to place them under the muscle. 7 yrs ago I had butt implants with DR roxi A month went by and left butt implant fell high n painful dr roxi said to give it time it would drop it never did a month after I got pregnant so I couldn’t do anything about it. butt implants feel hard. I want to move them under my muscle so they don’t feel as hard. Left implant hurts a lot too financially not in a good place but I can’t take the pain anymore. Help