2 vials restylane for v mild n/l & marionette lines + lips 17 mos ago. Cause of tissue changes post-op? What are the solutions?

Disliked from the start, felt overfilled, waited for it to dissolve. 6 mos in had extreme spontaneous swelling. Now 17 mos overfilled look still a problem. Feel palpable masses under skin both sides. I just want all volume to go away. Dr verifies resty was def used. 3 conservative rounds of vitrase helped maybe minimally but not back to baseline. What is causing? Encapsulation/granuloma? Have visitited new dr, no answer.