Any suggestions on how to get rid of the divot in the lip line at the injection site?

I received lip filler (Juvederm Volbella) for the first time 8 months ago. A few days after the injection, a dent appeared in my lower lip line where the needle was inserted. One also appeared on the other side, but it is much less noticeable. I returned to the injector for my follow up appointment. She was not sure why the dent appeared, so she tried to fill it with Juvederm, opting to not use Volbella again since I did have some granulomas from my initial Volbella treatment. It did not work.