What can be done to correct the appearance of hyper pigmented tech neck after dissolving filler? (photos)

I had filler injected in early February for my tech neck lines. It appeared almost darker and more purple. The injector tried different things to make it better like injecting saline, hyperpigmentation creams and retinol to no avail. She decided it was best to dissolve but my neck looks far worse than it did before I even touched it. I’m very hyper aware of it now, what can be done to fix it? Thank you!