Had filler twice for a dimple in my chin, want to try again with lip filler but I don’t want have the same thing happen. Advice?

Ive had filler twice for a dimple in my chin that I dont like. The 1st RN I saw used Voluma, topped with a little Juverderm,& used a few units of Botox around the chin to help relax the muscles I assume. The dimple immediately looked better, but after 2 days the dimple was back, not as bad but still back. 3 months later I saw a diff RN who used Voluma and same thing occurred. Why is this? I want to try again& try some lip filler but I don’t want have the same thing happen. Why is this happening?