Big Lumps and Swelling 2 Weeks After Sculptra Injections That Have Continued for 2 Months?

I had 2 vials of Sculptra injected 6 weeks apart almost a year ago and loved it. I went back 8 months later for another vial but this time lumps appeared 2 weeks after the injections in the center of my cheeks. After 2 rounds of saline injections, my face began to swell. Prednisone was a temporary fix. The lumps are still there and at least 1-1 1/2" round and hard and the apple of my cheeks are swollen. I've been on antibiotics for weeks. A reputable plastic surgeon did the injections.