Redensity 2 tear trough filler still present after 18 months, should I remove or will they fade?

18 months ago i had redensity2 tear trough fillers added. I wasnt happy with the results as you could see bumps on both sides. I went back after 2 weeks and she heated and massaged them which may have improved them slightly but i still wasn't happy. I was under the impression that these fillers would slowly dissolve/fade within a year though so I just left it. But 18 months on the bumps are still visible. At this point should i get them removed? Or will they eventually fade?