Suggestions for swelling under my eyes?

Depends on what was injected. It may be Tindal effect with the hyaluronic injection to close to the skin. Giving an injection of hyaluronidase to dissolve the injection may help. This is not definately as you need an examination to be sure

I can imagine that you are frustrated, but it is difficult to assess without an in-person evaluation. If your plastic surgeon has tried a few things and some months have passed without improvement, suggest that he or she refer you to another experienced plastic surgeon for another evaluation.